Upload Data

datalat <- read.csv("C:/Users/ASUS/Downloads/Kuliah Semester 5/Pengantar Model Linear/scrap price.csv")
datalat
##      ID symboling                            name fueltypes aspiration
## 1     1         3              alfa-romero giulia       gas        std
## 2     2         3             alfa-romero stelvio       gas        std
## 3     3         1        alfa-romero Quadrifoglio       gas        std
## 4     4         2                     audi 100 ls       gas        std
## 5     5         2                      audi 100ls       gas        std
## 6     6         2                        audi fox       gas        std
## 7     7         1                      audi 100ls       gas        std
## 8     8         1                       audi 5000       gas        std
## 9     9         1                       audi 4000       gas      turbo
## 10   10         0             audi 5000s (diesel)       gas      turbo
## 11   11         2                        bmw 320i       gas        std
## 12   12         0                        bmw 320i       gas        std
## 13   13         0                          bmw x1       gas        std
## 14   14         0                          bmw x3       gas        std
## 15   15         1                          bmw z4       gas        std
## 16   16         0                          bmw x4       gas        std
## 17   17         0                          bmw x5       gas        std
## 18   18         0                          bmw x3       gas        std
## 19   19         2                chevrolet impala       gas        std
## 20   20         1           chevrolet monte carlo       gas        std
## 21   21         0             chevrolet vega 2300       gas        std
## 22   22         1                   dodge rampage       gas        std
## 23   23         1             dodge challenger se       gas        std
## 24   24         1                      dodge d200       gas      turbo
## 25   25         1               dodge monaco (sw)       gas        std
## 26   26         1              dodge colt hardtop       gas        std
## 27   27         1                 dodge colt (sw)       gas        std
## 28   28         1            dodge coronet custom       gas      turbo
## 29   29        -1               dodge dart custom       gas        std
## 30   30         3       dodge coronet custom (sw)       gas      turbo
## 31   31         2                     honda civic       gas        std
## 32   32         2                honda civic cvcc       gas        std
## 33   33         1                     honda civic       gas        std
## 34   34         1               honda accord cvcc       gas        std
## 35   35         1                honda civic cvcc       gas        std
## 36   36         0                 honda accord lx       gas        std
## 37   37         0             honda civic 1500 gl       gas        std
## 38   38         0                    honda accord       gas        std
## 39   39         0                honda civic 1300       gas        std
## 40   40         0                   honda prelude       gas        std
## 41   41         0                    honda accord       gas        std
## 42   42         0                     honda civic       gas        std
## 43   43         1              honda civic (auto)       gas        std
## 44   44         0                      isuzu MU-X       gas        std
## 45   45         1                    isuzu D-Max        gas        std
## 46   46         0             isuzu D-Max V-Cross       gas        std
## 47   47         2                    isuzu D-Max        gas        std
## 48   48         0                       jaguar xj       gas        std
## 49   49         0                       jaguar xf       gas        std
## 50   50         0                       jaguar xk       gas        std
## 51   51         1                       maxda rx3       gas        std
## 52   52         1                maxda glc deluxe       gas        std
## 53   53         1                 mazda rx2 coupe       gas        std
## 54   54         1                      mazda rx-4       gas        std
## 55   55         1                mazda glc deluxe       gas        std
## 56   56         3                       mazda 626       gas        std
## 57   57         3                       mazda glc       gas        std
## 58   58         3                   mazda rx-7 gs       gas        std
## 59   59         3                     mazda glc 4       gas        std
## 60   60         1                       mazda 626       gas        std
## 61   61         0              mazda glc custom l       gas        std
## 62   62         1                mazda glc custom       gas        std
## 63   63         0                      mazda rx-4       gas        std
## 64   64         0                mazda glc deluxe    diesel        std
## 65   65         0                       mazda 626       gas        std
## 66   66         0                       mazda glc       gas        std
## 67   67         0                   mazda rx-7 gs    diesel        std
## 68   68        -1        buick electra 225 custom    diesel      turbo
## 69   69        -1        buick century luxus (sw)    diesel      turbo
## 70   70         0                   buick century    diesel      turbo
## 71   71        -1                   buick skyhawk    diesel      turbo
## 72   72        -1         buick opel isuzu deluxe       gas        std
## 73   73         3                   buick skylark       gas        std
## 74   74         0           buick century special       gas        std
## 75   75         1 buick regal sport coupe (turbo)       gas        std
## 76   76         1                  mercury cougar       gas      turbo
## 77   77         2               mitsubishi mirage       gas        std
## 78   78         2               mitsubishi lancer       gas        std
## 79   79         2            mitsubishi outlander       gas        std
## 80   80         1                   mitsubishi g4       gas      turbo
## 81   81         3            mitsubishi mirage g4       gas      turbo
## 82   82         3                   mitsubishi g4       gas        std
## 83   83         3            mitsubishi outlander       gas      turbo
## 84   84         3                   mitsubishi g4       gas      turbo
## 85   85         3            mitsubishi mirage g4       gas      turbo
## 86   86         1              mitsubishi montero       gas        std
## 87   87         1               mitsubishi pajero       gas        std
## 88   88         1            mitsubishi outlander       gas      turbo
## 89   89        -1            mitsubishi mirage g4       gas        std
## 90   90         1                    Nissan versa       gas        std
## 91   91         1                     nissan gt-r    diesel        std
## 92   92         1                    nissan rogue       gas        std
## 93   93         1                    nissan latio       gas        std
## 94   94         1                    nissan titan       gas        std
## 95   95         1                     nissan leaf       gas        std
## 96   96         1                     nissan juke       gas        std
## 97   97         1                    nissan latio       gas        std
## 98   98         1                     nissan note       gas        std
## 99   99         2                  nissan clipper       gas        std
## 100 100         0                    nissan rogue       gas        std
## 101 101         0                    nissan nv200       gas        std
## 102 102         0                     nissan dayz       gas        std
## 103 103         0                     nissan fuga       gas        std
## 104 104         0                     nissan otti       gas        std
## 105 105         3                    nissan teana       gas        std
## 106 106         3                    nissan kicks       gas      turbo
## 107 107         1                  nissan clipper       gas        std
## 108 108         0                     peugeot 504       gas        std
## 109 109         0                     peugeot 304    diesel      turbo
## 110 110         0                peugeot 504 (sw)       gas        std
## 111 111         0                     peugeot 504    diesel      turbo
## 112 112         0                     peugeot 504       gas        std
## 113 113         0                   peugeot 604sl    diesel      turbo
## 114 114         0                     peugeot 504       gas        std
## 115 115         0       peugeot 505s turbo diesel    diesel      turbo
## 116 116         0                     peugeot 504       gas        std
## 117 117         0                     peugeot 504    diesel      turbo
## 118 118         0                   peugeot 604sl       gas      turbo
## 119 119         1               plymouth fury iii       gas        std
## 120 120         1                plymouth cricket       gas      turbo
## 121 121         1               plymouth fury iii       gas        std
## 122 122         1  plymouth satellite custom (sw)       gas        std
## 123 123         1        plymouth fury gran sedan       gas        std
## 124 124        -1                plymouth valiant       gas        std
## 125 125         3                 plymouth duster       gas      turbo
## 126 126         3                   porsche macan       gas        std
## 127 127         3               porcshce panamera       gas        std
## 128 128         3                 porsche cayenne       gas        std
## 129 129         3                  porsche boxter       gas        std
## 130 130         1                 porsche cayenne       gas        std
## 131 131         0                    renault 12tl       gas        std
## 132 132         2                   renault 5 gtl       gas        std
## 133 133         3                        saab 99e       gas        std
## 134 134         2                       saab 99le       gas        std
## 135 135         3                       saab 99le       gas        std
## 136 136         2                      saab 99gle       gas        std
## 137 137         3                      saab 99gle       gas      turbo
## 138 138         2                        saab 99e       gas      turbo
## 139 139         2                          subaru       gas        std
## 140 140         2                       subaru dl       gas        std
## 141 141         2                       subaru dl       gas        std
## 142 142         0                          subaru       gas        std
## 143 143         0                      subaru brz       gas        std
## 144 144         0                     subaru baja       gas        std
## 145 145         0                       subaru r1       gas        std
## 146 146         0                       subaru r2       gas      turbo
## 147 147         0                   subaru trezia       gas        std
## 148 148         0                  subaru tribeca       gas        std
## 149 149         0                       subaru dl       gas        std
## 150 150         0                       subaru dl       gas      turbo
## 151 151         1           toyota corona mark ii       gas        std
## 152 152         1                   toyota corona       gas        std
## 153 153         1             toyota corolla 1200       gas        std
## 154 154         0           toyota corona hardtop       gas        std
## 155 155         0        toyota corolla 1600 (sw)       gas        std
## 156 156         0                   toyota carina       gas        std
## 157 157         0                  toyota mark ii       gas        std
## 158 158         0             toyota corolla 1200       gas        std
## 159 159         0                   toyota corona    diesel        std
## 160 160         0                  toyota corolla    diesel        std
## 161 161         0                   toyota corona       gas        std
## 162 162         0                  toyota corolla       gas        std
## 163 163         0                  toyota mark ii       gas        std
## 164 164         1         toyota corolla liftback       gas        std
## 165 165         1                   toyota corona       gas        std
## 166 166         1       toyota celica gt liftback       gas        std
## 167 167         1           toyota corolla tercel       gas        std
## 168 168         2          toyota corona liftback       gas        std
## 169 169         2                  toyota corolla       gas        std
## 170 170         2                  toyota starlet       gas        std
## 171 171         2                   toyota tercel       gas        std
## 172 172         2                  toyota corolla       gas        std
## 173 173         2                 toyota cressida       gas        std
## 174 174        -1                  toyota corolla       gas        std
## 175 175        -1                toyota celica gt    diesel      turbo
## 176 176        -1                   toyota corona       gas        std
## 177 177        -1                  toyota corolla       gas        std
## 178 178        -1                  toyota mark ii       gas        std
## 179 179         3         toyota corolla liftback       gas        std
## 180 180         3                   toyota corona       gas        std
## 181 181        -1                  toyota starlet       gas        std
## 182 182        -1                  toyouta tercel       gas        std
## 183 183         2                vokswagen rabbit    diesel        std
## 184 184         2    volkswagen 1131 deluxe sedan       gas        std
## 185 185         2            volkswagen model 111    diesel        std
## 186 186         2               volkswagen type 3       gas        std
## 187 187         2             volkswagen 411 (sw)       gas        std
## 188 188         2         volkswagen super beetle    diesel      turbo
## 189 189         2               volkswagen dasher       gas        std
## 190 190         3                       vw dasher       gas        std
## 191 191         3                       vw rabbit       gas        std
## 192 192         0               volkswagen rabbit       gas        std
## 193 193         0        volkswagen rabbit custom    diesel      turbo
## 194 194         0               volkswagen dasher       gas        std
## 195 195        -2                 volvo 145e (sw)       gas        std
## 196 196        -1                     volvo 144ea       gas        std
## 197 197        -2                     volvo 244dl       gas        std
## 198 198        -1                       volvo 245       gas        std
## 199 199        -2                     volvo 264gl       gas      turbo
## 200 200        -1                    volvo diesel       gas      turbo
## 201 201        -1                 volvo 145e (sw)       gas        std
## 202 202        -1                     volvo 144ea       gas      turbo
## 203 203        -1                     volvo 244dl       gas        std
## 204 204        -1                       volvo 246    diesel      turbo
## 205 205        -1                     volvo 264gl       gas      turbo
##     doornumbers     carbody drivewheels enginelocation wheelbase carlength
## 1           two convertible         rwd          front      88.6     168.8
## 2           two convertible         rwd          front      88.6     168.8
## 3           two   hatchback         rwd          front      94.5     171.2
## 4          four       sedan         fwd          front      99.8     176.6
## 5          four       sedan         4wd          front      99.4     176.6
## 6           two       sedan         fwd          front      99.8     177.3
## 7          four       sedan         fwd          front     105.8     192.7
## 8          four       wagon         fwd          front     105.8     192.7
## 9          four       sedan         fwd          front     105.8     192.7
## 10          two   hatchback         4wd          front      99.5     178.2
## 11          two       sedan         rwd          front     101.2     176.8
## 12         four       sedan         rwd          front     101.2     176.8
## 13          two       sedan         rwd          front     101.2     176.8
## 14         four       sedan         rwd          front     101.2     176.8
## 15         four       sedan         rwd          front     103.5     189.0
## 16         four       sedan         rwd          front     103.5     189.0
## 17          two       sedan         rwd          front     103.5     193.8
## 18         four       sedan         rwd          front     110.0     197.0
## 19          two   hatchback         fwd          front      88.4     141.1
## 20          two   hatchback         fwd          front      94.5     155.9
## 21         four       sedan         fwd          front      94.5     158.8
## 22          two   hatchback         fwd          front      93.7     157.3
## 23          two   hatchback         fwd          front      93.7     157.3
## 24          two   hatchback         fwd          front      93.7     157.3
## 25         four   hatchback         fwd          front      93.7     157.3
## 26         four       sedan         fwd          front      93.7     157.3
## 27         four       sedan         fwd          front      93.7     157.3
## 28          two       sedan         fwd          front      93.7     157.3
## 29         four       wagon         fwd          front     103.3     174.6
## 30          two   hatchback         fwd          front      95.9     173.2
## 31          two   hatchback         fwd          front      86.6     144.6
## 32          two   hatchback         fwd          front      86.6     144.6
## 33          two   hatchback         fwd          front      93.7     150.0
## 34          two   hatchback         fwd          front      93.7     150.0
## 35          two   hatchback         fwd          front      93.7     150.0
## 36         four       sedan         fwd          front      96.5     163.4
## 37         four       wagon         fwd          front      96.5     157.1
## 38          two   hatchback         fwd          front      96.5     167.5
## 39          two   hatchback         fwd          front      96.5     167.5
## 40         four       sedan         fwd          front      96.5     175.4
## 41         four       sedan         fwd          front      96.5     175.4
## 42         four       sedan         fwd          front      96.5     175.4
## 43          two       sedan         fwd          front      96.5     169.1
## 44         four       sedan         rwd          front      94.3     170.7
## 45          two       sedan         fwd          front      94.5     155.9
## 46         four       sedan         fwd          front      94.5     155.9
## 47          two   hatchback         rwd          front      96.0     172.6
## 48         four       sedan         rwd          front     113.0     199.6
## 49         four       sedan         rwd          front     113.0     199.6
## 50          two       sedan         rwd          front     102.0     191.7
## 51          two   hatchback         fwd          front      93.1     159.1
## 52          two   hatchback         fwd          front      93.1     159.1
## 53          two   hatchback         fwd          front      93.1     159.1
## 54         four       sedan         fwd          front      93.1     166.8
## 55         four       sedan         fwd          front      93.1     166.8
## 56          two   hatchback         rwd          front      95.3     169.0
## 57          two   hatchback         rwd          front      95.3     169.0
## 58          two   hatchback         rwd          front      95.3     169.0
## 59          two   hatchback         rwd          front      95.3     169.0
## 60          two   hatchback         fwd          front      98.8     177.8
## 61         four       sedan         fwd          front      98.8     177.8
## 62          two   hatchback         fwd          front      98.8     177.8
## 63         four       sedan         fwd          front      98.8     177.8
## 64         four       sedan         fwd          front      98.8     177.8
## 65         four   hatchback         fwd          front      98.8     177.8
## 66         four       sedan         rwd          front     104.9     175.0
## 67         four       sedan         rwd          front     104.9     175.0
## 68         four       sedan         rwd          front     110.0     190.9
## 69         four       wagon         rwd          front     110.0     190.9
## 70          two     hardtop         rwd          front     106.7     187.5
## 71         four       sedan         rwd          front     115.6     202.6
## 72         four       sedan         rwd          front     115.6     202.6
## 73          two convertible         rwd          front      96.6     180.3
## 74         four       sedan         rwd          front     120.9     208.1
## 75          two     hardtop         rwd          front     112.0     199.2
## 76          two   hatchback         rwd          front     102.7     178.4
## 77          two   hatchback         fwd          front      93.7     157.3
## 78          two   hatchback         fwd          front      93.7     157.3
## 79          two   hatchback         fwd          front      93.7     157.3
## 80          two   hatchback         fwd          front      93.0     157.3
## 81          two   hatchback         fwd          front      96.3     173.0
## 82          two   hatchback         fwd          front      96.3     173.0
## 83          two   hatchback         fwd          front      95.9     173.2
## 84          two   hatchback         fwd          front      95.9     173.2
## 85          two   hatchback         fwd          front      95.9     173.2
## 86         four       sedan         fwd          front      96.3     172.4
## 87         four       sedan         fwd          front      96.3     172.4
## 88         four       sedan         fwd          front      96.3     172.4
## 89         four       sedan         fwd          front      96.3     172.4
## 90          two       sedan         fwd          front      94.5     165.3
## 91          two       sedan         fwd          front      94.5     165.3
## 92          two       sedan         fwd          front      94.5     165.3
## 93         four       sedan         fwd          front      94.5     165.3
## 94         four       wagon         fwd          front      94.5     170.2
## 95          two       sedan         fwd          front      94.5     165.3
## 96          two   hatchback         fwd          front      94.5     165.6
## 97         four       sedan         fwd          front      94.5     165.3
## 98         four       wagon         fwd          front      94.5     170.2
## 99          two     hardtop         fwd          front      95.1     162.4
## 100        four   hatchback         fwd          front      97.2     173.4
## 101        four       sedan         fwd          front      97.2     173.4
## 102        four       sedan         fwd          front     100.4     181.7
## 103        four       wagon         fwd          front     100.4     184.6
## 104        four       sedan         fwd          front     100.4     184.6
## 105         two   hatchback         rwd          front      91.3     170.7
## 106         two   hatchback         rwd          front      91.3     170.7
## 107         two   hatchback         rwd          front      99.2     178.5
## 108        four       sedan         rwd          front     107.9     186.7
## 109        four       sedan         rwd          front     107.9     186.7
## 110        four       wagon         rwd          front     114.2     198.9
## 111        four       wagon         rwd          front     114.2     198.9
## 112        four       sedan         rwd          front     107.9     186.7
## 113        four       sedan         rwd          front     107.9     186.7
## 114        four       wagon         rwd          front     114.2     198.9
## 115        four       wagon         rwd          front     114.2     198.9
## 116        four       sedan         rwd          front     107.9     186.7
## 117        four       sedan         rwd          front     107.9     186.7
## 118        four       sedan         rwd          front     108.0     186.7
## 119         two   hatchback         fwd          front      93.7     157.3
## 120         two   hatchback         fwd          front      93.7     157.3
## 121        four   hatchback         fwd          front      93.7     157.3
## 122        four       sedan         fwd          front      93.7     167.3
## 123        four       sedan         fwd          front      93.7     167.3
## 124        four       wagon         fwd          front     103.3     174.6
## 125         two   hatchback         rwd          front      95.9     173.2
## 126         two   hatchback         rwd          front      94.5     168.9
## 127         two     hardtop         rwd           rear      89.5     168.9
## 128         two     hardtop         rwd           rear      89.5     168.9
## 129         two convertible         rwd           rear      89.5     168.9
## 130         two   hatchback         rwd          front      98.4     175.7
## 131        four       wagon         fwd          front      96.1     181.5
## 132         two   hatchback         fwd          front      96.1     176.8
## 133         two   hatchback         fwd          front      99.1     186.6
## 134        four       sedan         fwd          front      99.1     186.6
## 135         two   hatchback         fwd          front      99.1     186.6
## 136        four       sedan         fwd          front      99.1     186.6
## 137         two   hatchback         fwd          front      99.1     186.6
## 138        four       sedan         fwd          front      99.1     186.6
## 139         two   hatchback         fwd          front      93.7     156.9
## 140         two   hatchback         fwd          front      93.7     157.9
## 141         two   hatchback         4wd          front      93.3     157.3
## 142        four       sedan         fwd          front      97.2     172.0
## 143        four       sedan         fwd          front      97.2     172.0
## 144        four       sedan         fwd          front      97.2     172.0
## 145        four       sedan         4wd          front      97.0     172.0
## 146        four       sedan         4wd          front      97.0     172.0
## 147        four       wagon         fwd          front      97.0     173.5
## 148        four       wagon         fwd          front      97.0     173.5
## 149        four       wagon         4wd          front      96.9     173.6
## 150        four       wagon         4wd          front      96.9     173.6
## 151         two   hatchback         fwd          front      95.7     158.7
## 152         two   hatchback         fwd          front      95.7     158.7
## 153        four   hatchback         fwd          front      95.7     158.7
## 154        four       wagon         fwd          front      95.7     169.7
## 155        four       wagon         4wd          front      95.7     169.7
## 156        four       wagon         4wd          front      95.7     169.7
## 157        four       sedan         fwd          front      95.7     166.3
## 158        four   hatchback         fwd          front      95.7     166.3
## 159        four       sedan         fwd          front      95.7     166.3
## 160        four   hatchback         fwd          front      95.7     166.3
## 161        four       sedan         fwd          front      95.7     166.3
## 162        four   hatchback         fwd          front      95.7     166.3
## 163        four       sedan         fwd          front      95.7     166.3
## 164         two       sedan         rwd          front      94.5     168.7
## 165         two   hatchback         rwd          front      94.5     168.7
## 166         two       sedan         rwd          front      94.5     168.7
## 167         two   hatchback         rwd          front      94.5     168.7
## 168         two     hardtop         rwd          front      98.4     176.2
## 169         two     hardtop         rwd          front      98.4     176.2
## 170         two   hatchback         rwd          front      98.4     176.2
## 171         two     hardtop         rwd          front      98.4     176.2
## 172         two   hatchback         rwd          front      98.4     176.2
## 173         two convertible         rwd          front      98.4     176.2
## 174        four       sedan         fwd          front     102.4     175.6
## 175        four       sedan         fwd          front     102.4     175.6
## 176        four   hatchback         fwd          front     102.4     175.6
## 177        four       sedan         fwd          front     102.4     175.6
## 178        four   hatchback         fwd          front     102.4     175.6
## 179         two   hatchback         rwd          front     102.9     183.5
## 180         two   hatchback         rwd          front     102.9     183.5
## 181        four       sedan         rwd          front     104.5     187.8
## 182        four       wagon         rwd          front     104.5     187.8
## 183         two       sedan         fwd          front      97.3     171.7
## 184         two       sedan         fwd          front      97.3     171.7
## 185        four       sedan         fwd          front      97.3     171.7
## 186        four       sedan         fwd          front      97.3     171.7
## 187        four       sedan         fwd          front      97.3     171.7
## 188        four       sedan         fwd          front      97.3     171.7
## 189        four       sedan         fwd          front      97.3     171.7
## 190         two convertible         fwd          front      94.5     159.3
## 191         two   hatchback         fwd          front      94.5     165.7
## 192        four       sedan         fwd          front     100.4     180.2
## 193        four       sedan         fwd          front     100.4     180.2
## 194        four       wagon         fwd          front     100.4     183.1
## 195        four       sedan         rwd          front     104.3     188.8
## 196        four       wagon         rwd          front     104.3     188.8
## 197        four       sedan         rwd          front     104.3     188.8
## 198        four       wagon         rwd          front     104.3     188.8
## 199        four       sedan         rwd          front     104.3     188.8
## 200        four       wagon         rwd          front     104.3     188.8
## 201        four       sedan         rwd          front     109.1     188.8
## 202        four       sedan         rwd          front     109.1     188.8
## 203        four       sedan         rwd          front     109.1     188.8
## 204        four       sedan         rwd          front     109.1     188.8
## 205        four       sedan         rwd          front     109.1     188.8
##     carwidth carheight curbweight enginetype cylindernumber enginesize
## 1       64.1      48.8       2548       dohc           four        130
## 2       64.1      48.8       2548       dohc           four        130
## 3       65.5      52.4       2823       ohcv            six        152
## 4       66.2      54.3       2337        ohc           four        109
## 5       66.4      54.3       2824        ohc           five        136
## 6       66.3      53.1       2507        ohc           five        136
## 7       71.4      55.7       2844        ohc           five        136
## 8       71.4      55.7       2954        ohc           five        136
## 9       71.4      55.9       3086        ohc           five        131
## 10      67.9      52.0       3053        ohc           five        131
## 11      64.8      54.3       2395        ohc           four        108
## 12      64.8      54.3       2395        ohc           four        108
## 13      64.8      54.3       2710        ohc            six        164
## 14      64.8      54.3       2765        ohc            six        164
## 15      66.9      55.7       3055        ohc            six        164
## 16      66.9      55.7       3230        ohc            six        209
## 17      67.9      53.7       3380        ohc            six        209
## 18      70.9      56.3       3505        ohc            six        209
## 19      60.3      53.2       1488          l          three         61
## 20      63.6      52.0       1874        ohc           four         90
## 21      63.6      52.0       1909        ohc           four         90
## 22      63.8      50.8       1876        ohc           four         90
## 23      63.8      50.8       1876        ohc           four         90
## 24      63.8      50.8       2128        ohc           four         98
## 25      63.8      50.6       1967        ohc           four         90
## 26      63.8      50.6       1989        ohc           four         90
## 27      63.8      50.6       1989        ohc           four         90
## 28      63.8      50.6       2191        ohc           four         98
## 29      64.6      59.8       2535        ohc           four        122
## 30      66.3      50.2       2811        ohc           four        156
## 31      63.9      50.8       1713        ohc           four         92
## 32      63.9      50.8       1819        ohc           four         92
## 33      64.0      52.6       1837        ohc           four         79
## 34      64.0      52.6       1940        ohc           four         92
## 35      64.0      52.6       1956        ohc           four         92
## 36      64.0      54.5       2010        ohc           four         92
## 37      63.9      58.3       2024        ohc           four         92
## 38      65.2      53.3       2236        ohc           four        110
## 39      65.2      53.3       2289        ohc           four        110
## 40      65.2      54.1       2304        ohc           four        110
## 41      62.5      54.1       2372        ohc           four        110
## 42      65.2      54.1       2465        ohc           four        110
## 43      66.0      51.0       2293        ohc           four        110
## 44      61.8      53.5       2337        ohc           four        111
## 45      63.6      52.0       1874        ohc           four         90
## 46      63.6      52.0       1909        ohc           four         90
## 47      65.2      51.4       2734        ohc           four        119
## 48      69.6      52.8       4066       dohc            six        258
## 49      69.6      52.8       4066       dohc            six        258
## 50      70.6      47.8       3950       ohcv         twelve        326
## 51      64.2      54.1       1890        ohc           four         91
## 52      64.2      54.1       1900        ohc           four         91
## 53      64.2      54.1       1905        ohc           four         91
## 54      64.2      54.1       1945        ohc           four         91
## 55      64.2      54.1       1950        ohc           four         91
## 56      65.7      49.6       2380      rotor            two         70
## 57      65.7      49.6       2380      rotor            two         70
## 58      65.7      49.6       2385      rotor            two         70
## 59      65.7      49.6       2500      rotor            two         80
## 60      66.5      53.7       2385        ohc           four        122
## 61      66.5      55.5       2410        ohc           four        122
## 62      66.5      53.7       2385        ohc           four        122
## 63      66.5      55.5       2410        ohc           four        122
## 64      66.5      55.5       2443        ohc           four        122
## 65      66.5      55.5       2425        ohc           four        122
## 66      66.1      54.4       2670        ohc           four        140
## 67      66.1      54.4       2700        ohc           four        134
## 68      70.3      56.5       3515        ohc           five        183
## 69      70.3      58.7       3750        ohc           five        183
## 70      70.3      54.9       3495        ohc           five        183
## 71      71.7      56.3       3770        ohc           five        183
## 72      71.7      56.5       3740       ohcv          eight        234
## 73      70.5      50.8       3685       ohcv          eight        234
## 74      71.7      56.7       3900       ohcv          eight        308
## 75      72.0      55.4       3715       ohcv          eight        304
## 76      68.0      54.8       2910        ohc           four        140
## 77      64.4      50.8       1918        ohc           four         92
## 78      64.4      50.8       1944        ohc           four         92
## 79      64.4      50.8       2004        ohc           four         92
## 80      63.8      50.8       2145        ohc           four         98
## 81      65.4      49.4       2370        ohc           four        110
## 82      65.4      49.4       2328        ohc           four        122
## 83      66.3      50.2       2833        ohc           four        156
## 84      66.3      50.2       2921        ohc           four        156
## 85      66.3      50.2       2926        ohc           four        156
## 86      65.4      51.6       2365        ohc           four        122
## 87      65.4      51.6       2405        ohc           four        122
## 88      65.4      51.6       2403        ohc           four        110
## 89      65.4      51.6       2403        ohc           four        110
## 90      63.8      54.5       1889        ohc           four         97
## 91      63.8      54.5       2017        ohc           four        103
## 92      63.8      54.5       1918        ohc           four         97
## 93      63.8      54.5       1938        ohc           four         97
## 94      63.8      53.5       2024        ohc           four         97
## 95      63.8      54.5       1951        ohc           four         97
## 96      63.8      53.3       2028        ohc           four         97
## 97      63.8      54.5       1971        ohc           four         97
## 98      63.8      53.5       2037        ohc           four         97
## 99      63.8      53.3       2008        ohc           four         97
## 100     65.2      54.7       2324        ohc           four        120
## 101     65.2      54.7       2302        ohc           four        120
## 102     66.5      55.1       3095       ohcv            six        181
## 103     66.5      56.1       3296       ohcv            six        181
## 104     66.5      55.1       3060       ohcv            six        181
## 105     67.9      49.7       3071       ohcv            six        181
## 106     67.9      49.7       3139       ohcv            six        181
## 107     67.9      49.7       3139       ohcv            six        181
## 108     68.4      56.7       3020          l           four        120
## 109     68.4      56.7       3197          l           four        152
## 110     68.4      58.7       3230          l           four        120
## 111     68.4      58.7       3430          l           four        152
## 112     68.4      56.7       3075          l           four        120
## 113     68.4      56.7       3252          l           four        152
## 114     68.4      56.7       3285          l           four        120
## 115     68.4      58.7       3485          l           four        152
## 116     68.4      56.7       3075          l           four        120
## 117     68.4      56.7       3252          l           four        152
## 118     68.3      56.0       3130          l           four        134
## 119     63.8      50.8       1918        ohc           four         90
## 120     63.8      50.8       2128        ohc           four         98
## 121     63.8      50.6       1967        ohc           four         90
## 122     63.8      50.8       1989        ohc           four         90
## 123     63.8      50.8       2191        ohc           four         98
## 124     64.6      59.8       2535        ohc           four        122
## 125     66.3      50.2       2818        ohc           four        156
## 126     68.3      50.2       2778        ohc           four        151
## 127     65.0      51.6       2756       ohcf            six        194
## 128     65.0      51.6       2756       ohcf            six        194
## 129     65.0      51.6       2800       ohcf            six        194
## 130     72.3      50.5       3366      dohcv          eight        203
## 131     66.5      55.2       2579        ohc           four        132
## 132     66.6      50.5       2460        ohc           four        132
## 133     66.5      56.1       2658        ohc           four        121
## 134     66.5      56.1       2695        ohc           four        121
## 135     66.5      56.1       2707        ohc           four        121
## 136     66.5      56.1       2758        ohc           four        121
## 137     66.5      56.1       2808       dohc           four        121
## 138     66.5      56.1       2847       dohc           four        121
## 139     63.4      53.7       2050       ohcf           four         97
## 140     63.6      53.7       2120       ohcf           four        108
## 141     63.8      55.7       2240       ohcf           four        108
## 142     65.4      52.5       2145       ohcf           four        108
## 143     65.4      52.5       2190       ohcf           four        108
## 144     65.4      52.5       2340       ohcf           four        108
## 145     65.4      54.3       2385       ohcf           four        108
## 146     65.4      54.3       2510       ohcf           four        108
## 147     65.4      53.0       2290       ohcf           four        108
## 148     65.4      53.0       2455       ohcf           four        108
## 149     65.4      54.9       2420       ohcf           four        108
## 150     65.4      54.9       2650       ohcf           four        108
## 151     63.6      54.5       1985        ohc           four         92
## 152     63.6      54.5       2040        ohc           four         92
## 153     63.6      54.5       2015        ohc           four         92
## 154     63.6      59.1       2280        ohc           four         92
## 155     63.6      59.1       2290        ohc           four         92
## 156     63.6      59.1       3110        ohc           four         92
## 157     64.4      53.0       2081        ohc           four         98
## 158     64.4      52.8       2109        ohc           four         98
## 159     64.4      53.0       2275        ohc           four        110
## 160     64.4      52.8       2275        ohc           four        110
## 161     64.4      53.0       2094        ohc           four         98
## 162     64.4      52.8       2122        ohc           four         98
## 163     64.4      52.8       2140        ohc           four         98
## 164     64.0      52.6       2169        ohc           four         98
## 165     64.0      52.6       2204        ohc           four         98
## 166     64.0      52.6       2265       dohc           four         98
## 167     64.0      52.6       2300       dohc           four         98
## 168     65.6      52.0       2540        ohc           four        146
## 169     65.6      52.0       2536        ohc           four        146
## 170     65.6      52.0       2551        ohc           four        146
## 171     65.6      52.0       2679        ohc           four        146
## 172     65.6      52.0       2714        ohc           four        146
## 173     65.6      53.0       2975        ohc           four        146
## 174     66.5      54.9       2326        ohc           four        122
## 175     66.5      54.9       2480        ohc           four        110
## 176     66.5      53.9       2414        ohc           four        122
## 177     66.5      54.9       2414        ohc           four        122
## 178     66.5      53.9       2458        ohc           four        122
## 179     67.7      52.0       2976       dohc            six        171
## 180     67.7      52.0       3016       dohc            six        171
## 181     66.5      54.1       3131       dohc            six        171
## 182     66.5      54.1       3151       dohc            six        161
## 183     65.5      55.7       2261        ohc           four         97
## 184     65.5      55.7       2209        ohc           four        109
## 185     65.5      55.7       2264        ohc           four         97
## 186     65.5      55.7       2212        ohc           four        109
## 187     65.5      55.7       2275        ohc           four        109
## 188     65.5      55.7       2319        ohc           four         97
## 189     65.5      55.7       2300        ohc           four        109
## 190     64.2      55.6       2254        ohc           four        109
## 191     64.0      51.4       2221        ohc           four        109
## 192     66.9      55.1       2661        ohc           five        136
## 193     66.9      55.1       2579        ohc           four         97
## 194     66.9      55.1       2563        ohc           four        109
## 195     67.2      56.2       2912        ohc           four        141
## 196     67.2      57.5       3034        ohc           four        141
## 197     67.2      56.2       2935        ohc           four        141
## 198     67.2      57.5       3042        ohc           four        141
## 199     67.2      56.2       3045        ohc           four        130
## 200     67.2      57.5       3157        ohc           four        130
## 201     68.9      55.5       2952        ohc           four        141
## 202     68.8      55.5       3049        ohc           four        141
## 203     68.9      55.5       3012       ohcv            six        173
## 204     68.9      55.5       3217        ohc            six        145
## 205     68.9      55.5       3062        ohc           four        141
##     fuelsystem boreratio stroke compressionratio horsepower peakrpm citympg
## 1         mpfi      3.47  2.680             9.00        111    5000      21
## 2         mpfi      3.47  2.680             9.00        111    5000      21
## 3         mpfi      2.68  3.470             9.00        154    5000      19
## 4         mpfi      3.19  3.400            10.00        102    5500      24
## 5         mpfi      3.19  3.400             8.00        115    5500      18
## 6         mpfi      3.19  3.400             8.50        110    5500      19
## 7         mpfi      3.19  3.400             8.50        110    5500      19
## 8         mpfi      3.19  3.400             8.50        110    5500      19
## 9         mpfi      3.13  3.400             8.30        140    5500      17
## 10        mpfi      3.13  3.400             7.00        160    5500      16
## 11        mpfi      3.50  2.800             8.80        101    5800      23
## 12        mpfi      3.50  2.800             8.80        101    5800      23
## 13        mpfi      3.31  3.190             9.00        121    4250      21
## 14        mpfi      3.31  3.190             9.00        121    4250      21
## 15        mpfi      3.31  3.190             9.00        121    4250      20
## 16        mpfi      3.62  3.390             8.00        182    5400      16
## 17        mpfi      3.62  3.390             8.00        182    5400      16
## 18        mpfi      3.62  3.390             8.00        182    5400      15
## 19        2bbl      2.91  3.030             9.50         48    5100      47
## 20        2bbl      3.03  3.110             9.60         70    5400      38
## 21        2bbl      3.03  3.110             9.60         70    5400      38
## 22        2bbl      2.97  3.230             9.41         68    5500      37
## 23        2bbl      2.97  3.230             9.40         68    5500      31
## 24        mpfi      3.03  3.390             7.60        102    5500      24
## 25        2bbl      2.97  3.230             9.40         68    5500      31
## 26        2bbl      2.97  3.230             9.40         68    5500      31
## 27        2bbl      2.97  3.230             9.40         68    5500      31
## 28        mpfi      3.03  3.390             7.60        102    5500      24
## 29        2bbl      3.34  3.460             8.50         88    5000      24
## 30         mfi      3.60  3.900             7.00        145    5000      19
## 31        1bbl      2.91  3.410             9.60         58    4800      49
## 32        1bbl      2.91  3.410             9.20         76    6000      31
## 33        1bbl      2.91  3.070            10.10         60    5500      38
## 34        1bbl      2.91  3.410             9.20         76    6000      30
## 35        1bbl      2.91  3.410             9.20         76    6000      30
## 36        1bbl      2.91  3.410             9.20         76    6000      30
## 37        1bbl      2.92  3.410             9.20         76    6000      30
## 38        1bbl      3.15  3.580             9.00         86    5800      27
## 39        1bbl      3.15  3.580             9.00         86    5800      27
## 40        1bbl      3.15  3.580             9.00         86    5800      27
## 41        1bbl      3.15  3.580             9.00         86    5800      27
## 42        mpfi      3.15  3.580             9.00        101    5800      24
## 43        2bbl      3.15  3.580             9.10        100    5500      25
## 44        2bbl      3.31  3.230             8.50         78    4800      24
## 45        2bbl      3.03  3.110             9.60         70    5400      38
## 46        2bbl      3.03  3.110             9.60         70    5400      38
## 47        spfi      3.43  3.230             9.20         90    5000      24
## 48        mpfi      3.63  4.170             8.10        176    4750      15
## 49        mpfi      3.63  4.170             8.10        176    4750      15
## 50        mpfi      3.54  2.760            11.50        262    5000      13
## 51        2bbl      3.03  3.150             9.00         68    5000      30
## 52        2bbl      3.03  3.150             9.00         68    5000      31
## 53        2bbl      3.03  3.150             9.00         68    5000      31
## 54        2bbl      3.03  3.150             9.00         68    5000      31
## 55        2bbl      3.08  3.150             9.00         68    5000      31
## 56        4bbl      3.33  3.255             9.40        101    6000      17
## 57        4bbl      3.33  3.255             9.40        101    6000      17
## 58        4bbl      3.33  3.255             9.40        101    6000      17
## 59        mpfi      3.33  3.255             9.40        135    6000      16
## 60        2bbl      3.39  3.390             8.60         84    4800      26
## 61        2bbl      3.39  3.390             8.60         84    4800      26
## 62        2bbl      3.39  3.390             8.60         84    4800      26
## 63        2bbl      3.39  3.390             8.60         84    4800      26
## 64         idi      3.39  3.390            22.70         64    4650      36
## 65        2bbl      3.39  3.390             8.60         84    4800      26
## 66        mpfi      3.76  3.160             8.00        120    5000      19
## 67         idi      3.43  3.640            22.00         72    4200      31
## 68         idi      3.58  3.640            21.50        123    4350      22
## 69         idi      3.58  3.640            21.50        123    4350      22
## 70         idi      3.58  3.640            21.50        123    4350      22
## 71         idi      3.58  3.640            21.50        123    4350      22
## 72        mpfi      3.46  3.100             8.30        155    4750      16
## 73        mpfi      3.46  3.100             8.30        155    4750      16
## 74        mpfi      3.80  3.350             8.00        184    4500      14
## 75        mpfi      3.80  3.350             8.00        184    4500      14
## 76        mpfi      3.78  3.120             8.00        175    5000      19
## 77        2bbl      2.97  3.230             9.40         68    5500      37
## 78        2bbl      2.97  3.230             9.40         68    5500      31
## 79        2bbl      2.97  3.230             9.40         68    5500      31
## 80        spdi      3.03  3.390             7.60        102    5500      24
## 81        spdi      3.17  3.460             7.50        116    5500      23
## 82        2bbl      3.35  3.460             8.50         88    5000      25
## 83        spdi      3.58  3.860             7.00        145    5000      19
## 84        spdi      3.59  3.860             7.00        145    5000      19
## 85        spdi      3.59  3.860             7.00        145    5000      19
## 86        2bbl      3.35  3.460             8.50         88    5000      25
## 87        2bbl      3.35  3.460             8.50         88    5000      25
## 88        spdi      3.17  3.460             7.50        116    5500      23
## 89        spdi      3.17  3.460             7.50        116    5500      23
## 90        2bbl      3.15  3.290             9.40         69    5200      31
## 91         idi      2.99  3.470            21.90         55    4800      45
## 92        2bbl      3.15  3.290             9.40         69    5200      31
## 93        2bbl      3.15  3.290             9.40         69    5200      31
## 94        2bbl      3.15  3.290             9.40         69    5200      31
## 95        2bbl      3.15  3.290             9.40         69    5200      31
## 96        2bbl      3.15  3.290             9.40         69    5200      31
## 97        2bbl      3.15  3.290             9.40         69    5200      31
## 98        2bbl      3.15  3.290             9.40         69    5200      31
## 99        2bbl      3.15  3.290             9.40         69    5200      31
## 100       2bbl      3.33  3.470             8.50         97    5200      27
## 101       2bbl      3.33  3.470             8.50         97    5200      27
## 102       mpfi      3.43  3.270             9.00        152    5200      17
## 103       mpfi      3.43  3.270             9.00        152    5200      17
## 104       mpfi      3.43  3.270             9.00        152    5200      19
## 105       mpfi      3.43  3.270             9.00        160    5200      19
## 106       mpfi      3.43  3.270             7.80        200    5200      17
## 107       mpfi      3.43  3.270             9.00        160    5200      19
## 108       mpfi      3.46  3.190             8.40         97    5000      19
## 109        idi      3.70  3.520            21.00         95    4150      28
## 110       mpfi      3.46  3.190             8.40         97    5000      19
## 111        idi      3.70  3.520            21.00         95    4150      25
## 112       mpfi      3.46  2.190             8.40         95    5000      19
## 113        idi      3.70  3.520            21.00         95    4150      28
## 114       mpfi      3.46  2.190             8.40         95    5000      19
## 115        idi      3.70  3.520            21.00         95    4150      25
## 116       mpfi      3.46  3.190             8.40         97    5000      19
## 117        idi      3.70  3.520            21.00         95    4150      28
## 118       mpfi      3.61  3.210             7.00        142    5600      18
## 119       2bbl      2.97  3.230             9.40         68    5500      37
## 120       spdi      3.03  3.390             7.60        102    5500      24
## 121       2bbl      2.97  3.230             9.40         68    5500      31
## 122       2bbl      2.97  3.230             9.40         68    5500      31
## 123       2bbl      2.97  3.230             9.40         68    5500      31
## 124       2bbl      3.35  3.460             8.50         88    5000      24
## 125       spdi      3.59  3.860             7.00        145    5000      19
## 126       mpfi      3.94  3.110             9.50        143    5500      19
## 127       mpfi      3.74  2.900             9.50        207    5900      17
## 128       mpfi      3.74  2.900             9.50        207    5900      17
## 129       mpfi      3.74  2.900             9.50        207    5900      17
## 130       mpfi      3.94  3.110            10.00        288    5750      17
## 131       mpfi      3.46  3.900             8.70         90    5100      23
## 132       mpfi      3.46  3.900             8.70         90    5100      23
## 133       mpfi      3.54  3.070             9.31        110    5250      21
## 134       mpfi      3.54  3.070             9.30        110    5250      21
## 135       mpfi      2.54  2.070             9.30        110    5250      21
## 136       mpfi      3.54  3.070             9.30        110    5250      21
## 137       mpfi      3.54  3.070             9.00        160    5500      19
## 138       mpfi      3.54  3.070             9.00        160    5500      19
## 139       2bbl      3.62  2.360             9.00         69    4900      31
## 140       2bbl      3.62  2.640             8.70         73    4400      26
## 141       2bbl      3.62  2.640             8.70         73    4400      26
## 142       2bbl      3.62  2.640             9.50         82    4800      32
## 143       2bbl      3.62  2.640             9.50         82    4400      28
## 144       mpfi      3.62  2.640             9.00         94    5200      26
## 145       2bbl      3.62  2.640             9.00         82    4800      24
## 146       mpfi      3.62  2.640             7.70        111    4800      24
## 147       2bbl      3.62  2.640             9.00         82    4800      28
## 148       mpfi      3.62  2.640             9.00         94    5200      25
## 149       2bbl      3.62  2.640             9.00         82    4800      23
## 150       mpfi      3.62  2.640             7.70        111    4800      23
## 151       2bbl      3.05  3.030             9.00         62    4800      35
## 152       2bbl      3.05  3.030             9.00         62    4800      31
## 153       2bbl      3.05  3.030             9.00         62    4800      31
## 154       2bbl      3.05  3.030             9.00         62    4800      31
## 155       2bbl      3.05  3.030             9.00         62    4800      27
## 156       2bbl      3.05  3.030             9.00         62    4800      27
## 157       2bbl      3.19  3.030             9.00         70    4800      30
## 158       2bbl      3.19  3.030             9.00         70    4800      30
## 159        idi      3.27  3.350            22.50         56    4500      34
## 160        idi      3.27  3.350            22.50         56    4500      38
## 161       2bbl      3.19  3.030             9.00         70    4800      38
## 162       2bbl      3.19  3.030             9.00         70    4800      28
## 163       2bbl      3.19  3.030             9.00         70    4800      28
## 164       2bbl      3.19  3.030             9.00         70    4800      29
## 165       2bbl      3.19  3.030             9.00         70    4800      29
## 166       mpfi      3.24  3.080             9.40        112    6600      26
## 167       mpfi      3.24  3.080             9.40        112    6600      26
## 168       mpfi      3.62  3.500             9.30        116    4800      24
## 169       mpfi      3.62  3.500             9.30        116    4800      24
## 170       mpfi      3.62  3.500             9.30        116    4800      24
## 171       mpfi      3.62  3.500             9.30        116    4800      24
## 172       mpfi      3.62  3.500             9.30        116    4800      24
## 173       mpfi      3.62  3.500             9.30        116    4800      24
## 174       mpfi      3.31  3.540             8.70         92    4200      29
## 175        idi      3.27  3.350            22.50         73    4500      30
## 176       mpfi      3.31  3.540             8.70         92    4200      27
## 177       mpfi      3.31  3.540             8.70         92    4200      27
## 178       mpfi      3.31  3.540             8.70         92    4200      27
## 179       mpfi      3.27  3.350             9.30        161    5200      20
## 180       mpfi      3.27  3.350             9.30        161    5200      19
## 181       mpfi      3.27  3.350             9.20        156    5200      20
## 182       mpfi      3.27  3.350             9.20        156    5200      19
## 183        idi      3.01  3.400            23.00         52    4800      37
## 184       mpfi      3.19  3.400             9.00         85    5250      27
## 185        idi      3.01  3.400            23.00         52    4800      37
## 186       mpfi      3.19  3.400             9.00         85    5250      27
## 187       mpfi      3.19  3.400             9.00         85    5250      27
## 188        idi      3.01  3.400            23.00         68    4500      37
## 189       mpfi      3.19  3.400            10.00        100    5500      26
## 190       mpfi      3.19  3.400             8.50         90    5500      24
## 191       mpfi      3.19  3.400             8.50         90    5500      24
## 192       mpfi      3.19  3.400             8.50        110    5500      19
## 193        idi      3.01  3.400            23.00         68    4500      33
## 194       mpfi      3.19  3.400             9.00         88    5500      25
## 195       mpfi      3.78  3.150             9.50        114    5400      23
## 196       mpfi      3.78  3.150             9.50        114    5400      23
## 197       mpfi      3.78  3.150             9.50        114    5400      24
## 198       mpfi      3.78  3.150             9.50        114    5400      24
## 199       mpfi      3.62  3.150             7.50        162    5100      17
## 200       mpfi      3.62  3.150             7.50        162    5100      17
## 201       mpfi      3.78  3.150             9.50        114    5400      23
## 202       mpfi      3.78  3.150             8.70        160    5300      19
## 203       mpfi      3.58  2.870             8.80        134    5500      18
## 204        idi      3.01  3.400            23.00        106    4800      26
## 205       mpfi      3.78  3.150             9.50        114    5400      19
##     highwaympg    price
## 1           27 13495.00
## 2           27 16500.00
## 3           26 16500.00
## 4           30 13950.00
## 5           22 17450.00
## 6           25 15250.00
## 7           25 17710.00
## 8           25 18920.00
## 9           20 23875.00
## 10          22 17859.17
## 11          29 16430.00
## 12          29 16925.00
## 13          28 20970.00
## 14          28 21105.00
## 15          25 24565.00
## 16          22 30760.00
## 17          22 41315.00
## 18          20 36880.00
## 19          53  5151.00
## 20          43  6295.00
## 21          43  6575.00
## 22          41  5572.00
## 23          38  6377.00
## 24          30  7957.00
## 25          38  6229.00
## 26          38  6692.00
## 27          38  7609.00
## 28          30  8558.00
## 29          30  8921.00
## 30          24 12964.00
## 31          54  6479.00
## 32          38  6855.00
## 33          42  5399.00
## 34          34  6529.00
## 35          34  7129.00
## 36          34  7295.00
## 37          34  7295.00
## 38          33  7895.00
## 39          33  9095.00
## 40          33  8845.00
## 41          33 10295.00
## 42          28 12945.00
## 43          31 10345.00
## 44          29  6785.00
## 45          43  8916.50
## 46          43  8916.50
## 47          29 11048.00
## 48          19 32250.00
## 49          19 35550.00
## 50          17 36000.00
## 51          31  5195.00
## 52          38  6095.00
## 53          38  6795.00
## 54          38  6695.00
## 55          38  7395.00
## 56          23 10945.00
## 57          23 11845.00
## 58          23 13645.00
## 59          23 15645.00
## 60          32  8845.00
## 61          32  8495.00
## 62          32 10595.00
## 63          32 10245.00
## 64          42 10795.00
## 65          32 11245.00
## 66          27 18280.00
## 67          39 18344.00
## 68          25 25552.00
## 69          25 28248.00
## 70          25 28176.00
## 71          25 31600.00
## 72          18 34184.00
## 73          18 35056.00
## 74          16 40960.00
## 75          16 45400.00
## 76          24 16503.00
## 77          41  5389.00
## 78          38  6189.00
## 79          38  6669.00
## 80          30  7689.00
## 81          30  9959.00
## 82          32  8499.00
## 83          24 12629.00
## 84          24 14869.00
## 85          24 14489.00
## 86          32  6989.00
## 87          32  8189.00
## 88          30  9279.00
## 89          30  9279.00
## 90          37  5499.00
## 91          50  7099.00
## 92          37  6649.00
## 93          37  6849.00
## 94          37  7349.00
## 95          37  7299.00
## 96          37  7799.00
## 97          37  7499.00
## 98          37  7999.00
## 99          37  8249.00
## 100         34  8949.00
## 101         34  9549.00
## 102         22 13499.00
## 103         22 14399.00
## 104         25 13499.00
## 105         25 17199.00
## 106         23 19699.00
## 107         25 18399.00
## 108         24 11900.00
## 109         33 13200.00
## 110         24 12440.00
## 111         25 13860.00
## 112         24 15580.00
## 113         33 16900.00
## 114         24 16695.00
## 115         25 17075.00
## 116         24 16630.00
## 117         33 17950.00
## 118         24 18150.00
## 119         41  5572.00
## 120         30  7957.00
## 121         38  6229.00
## 122         38  6692.00
## 123         38  7609.00
## 124         30  8921.00
## 125         24 12764.00
## 126         27 22018.00
## 127         25 32528.00
## 128         25 34028.00
## 129         25 37028.00
## 130         28 31400.50
## 131         31  9295.00
## 132         31  9895.00
## 133         28 11850.00
## 134         28 12170.00
## 135         28 15040.00
## 136         28 15510.00
## 137         26 18150.00
## 138         26 18620.00
## 139         36  5118.00
## 140         31  7053.00
## 141         31  7603.00
## 142         37  7126.00
## 143         33  7775.00
## 144         32  9960.00
## 145         25  9233.00
## 146         29 11259.00
## 147         32  7463.00
## 148         31 10198.00
## 149         29  8013.00
## 150         23 11694.00
## 151         39  5348.00
## 152         38  6338.00
## 153         38  6488.00
## 154         37  6918.00
## 155         32  7898.00
## 156         32  8778.00
## 157         37  6938.00
## 158         37  7198.00
## 159         36  7898.00
## 160         47  7788.00
## 161         47  7738.00
## 162         34  8358.00
## 163         34  9258.00
## 164         34  8058.00
## 165         34  8238.00
## 166         29  9298.00
## 167         29  9538.00
## 168         30  8449.00
## 169         30  9639.00
## 170         30  9989.00
## 171         30 11199.00
## 172         30 11549.00
## 173         30 17669.00
## 174         34  8948.00
## 175         33 10698.00
## 176         32  9988.00
## 177         32 10898.00
## 178         32 11248.00
## 179         24 16558.00
## 180         24 15998.00
## 181         24 15690.00
## 182         24 15750.00
## 183         46  7775.00
## 184         34  7975.00
## 185         46  7995.00
## 186         34  8195.00
## 187         34  8495.00
## 188         42  9495.00
## 189         32  9995.00
## 190         29 11595.00
## 191         29  9980.00
## 192         24 13295.00
## 193         38 13845.00
## 194         31 12290.00
## 195         28 12940.00
## 196         28 13415.00
## 197         28 15985.00
## 198         28 16515.00
## 199         22 18420.00
## 200         22 18950.00
## 201         28 16845.00
## 202         25 19045.00
## 203         23 21485.00
## 204         27 22470.00
## 205         25 22625.00
y <- datalat$price
x1 <- datalat$highwaympg
x2 <- datalat$boreratio
x3 <- datalat$horsepower
x4 <- datalat$citympg

Buat matriks X

x0 isinya vektor 1 semua, variabel x1 displacement, variabel x2 horsepower, variabel x3 rear axle ratio

x0<-rep(1, dim(datalat)[1])
x0
##   [1] 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
##  [38] 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
##  [75] 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
## [112] 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
## [149] 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
## [186] 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
x1<- datalat$highwaympg
x1
##   [1] 27 27 26 30 22 25 25 25 20 22 29 29 28 28 25 22 22 20 53 43 43 41 38 30 38
##  [26] 38 38 30 30 24 54 38 42 34 34 34 34 33 33 33 33 28 31 29 43 43 29 19 19 17
##  [51] 31 38 38 38 38 23 23 23 23 32 32 32 32 42 32 27 39 25 25 25 25 18 18 16 16
##  [76] 24 41 38 38 30 30 32 24 24 24 32 32 30 30 37 50 37 37 37 37 37 37 37 37 34
## [101] 34 22 22 25 25 23 25 24 33 24 25 24 33 24 25 24 33 24 41 30 38 38 38 30 24
## [126] 27 25 25 25 28 31 31 28 28 28 28 26 26 36 31 31 37 33 32 25 29 32 31 29 23
## [151] 39 38 38 37 32 32 37 37 36 47 47 34 34 34 34 29 29 30 30 30 30 30 30 34 33
## [176] 32 32 32 24 24 24 24 46 34 46 34 34 42 32 29 29 24 38 31 28 28 28 28 22 22
## [201] 28 25 23 27 25
x2<-datalat$boreratio
x2
##   [1] 3.47 3.47 2.68 3.19 3.19 3.19 3.19 3.19 3.13 3.13 3.50 3.50 3.31 3.31 3.31
##  [16] 3.62 3.62 3.62 2.91 3.03 3.03 2.97 2.97 3.03 2.97 2.97 2.97 3.03 3.34 3.60
##  [31] 2.91 2.91 2.91 2.91 2.91 2.91 2.92 3.15 3.15 3.15 3.15 3.15 3.15 3.31 3.03
##  [46] 3.03 3.43 3.63 3.63 3.54 3.03 3.03 3.03 3.03 3.08 3.33 3.33 3.33 3.33 3.39
##  [61] 3.39 3.39 3.39 3.39 3.39 3.76 3.43 3.58 3.58 3.58 3.58 3.46 3.46 3.80 3.80
##  [76] 3.78 2.97 2.97 2.97 3.03 3.17 3.35 3.58 3.59 3.59 3.35 3.35 3.17 3.17 3.15
##  [91] 2.99 3.15 3.15 3.15 3.15 3.15 3.15 3.15 3.15 3.33 3.33 3.43 3.43 3.43 3.43
## [106] 3.43 3.43 3.46 3.70 3.46 3.70 3.46 3.70 3.46 3.70 3.46 3.70 3.61 2.97 3.03
## [121] 2.97 2.97 2.97 3.35 3.59 3.94 3.74 3.74 3.74 3.94 3.46 3.46 3.54 3.54 2.54
## [136] 3.54 3.54 3.54 3.62 3.62 3.62 3.62 3.62 3.62 3.62 3.62 3.62 3.62 3.62 3.62
## [151] 3.05 3.05 3.05 3.05 3.05 3.05 3.19 3.19 3.27 3.27 3.19 3.19 3.19 3.19 3.19
## [166] 3.24 3.24 3.62 3.62 3.62 3.62 3.62 3.62 3.31 3.27 3.31 3.31 3.31 3.27 3.27
## [181] 3.27 3.27 3.01 3.19 3.01 3.19 3.19 3.01 3.19 3.19 3.19 3.19 3.01 3.19 3.78
## [196] 3.78 3.78 3.78 3.62 3.62 3.78 3.78 3.58 3.01 3.78
x3<-datalat$horsepower
x3
##   [1] 111 111 154 102 115 110 110 110 140 160 101 101 121 121 121 182 182 182
##  [19]  48  70  70  68  68 102  68  68  68 102  88 145  58  76  60  76  76  76
##  [37]  76  86  86  86  86 101 100  78  70  70  90 176 176 262  68  68  68  68
##  [55]  68 101 101 101 135  84  84  84  84  64  84 120  72 123 123 123 123 155
##  [73] 155 184 184 175  68  68  68 102 116  88 145 145 145  88  88 116 116  69
##  [91]  55  69  69  69  69  69  69  69  69  97  97 152 152 152 160 200 160  97
## [109]  95  97  95  95  95  95  95  97  95 142  68 102  68  68  68  88 145 143
## [127] 207 207 207 288  90  90 110 110 110 110 160 160  69  73  73  82  82  94
## [145]  82 111  82  94  82 111  62  62  62  62  62  62  70  70  56  56  70  70
## [163]  70  70  70 112 112 116 116 116 116 116 116  92  73  92  92  92 161 161
## [181] 156 156  52  85  52  85  85  68 100  90  90 110  68  88 114 114 114 114
## [199] 162 162 114 160 134 106 114
x4 <- datalat$citympg
x4
##   [1] 21 21 19 24 18 19 19 19 17 16 23 23 21 21 20 16 16 15 47 38 38 37 31 24 31
##  [26] 31 31 24 24 19 49 31 38 30 30 30 30 27 27 27 27 24 25 24 38 38 24 15 15 13
##  [51] 30 31 31 31 31 17 17 17 16 26 26 26 26 36 26 19 31 22 22 22 22 16 16 14 14
##  [76] 19 37 31 31 24 23 25 19 19 19 25 25 23 23 31 45 31 31 31 31 31 31 31 31 27
## [101] 27 17 17 19 19 17 19 19 28 19 25 19 28 19 25 19 28 18 37 24 31 31 31 24 19
## [126] 19 17 17 17 17 23 23 21 21 21 21 19 19 31 26 26 32 28 26 24 24 28 25 23 23
## [151] 35 31 31 31 27 27 30 30 34 38 38 28 28 29 29 26 26 24 24 24 24 24 24 29 30
## [176] 27 27 27 20 19 20 19 37 27 37 27 27 37 26 24 24 19 33 25 23 23 24 24 17 17
## [201] 23 19 18 26 19

Sehingga matriks X menjadi

X<-cbind(x0, x1, x2, x3, x4)
X
##        x0 x1   x2  x3 x4
##   [1,]  1 27 3.47 111 21
##   [2,]  1 27 3.47 111 21
##   [3,]  1 26 2.68 154 19
##   [4,]  1 30 3.19 102 24
##   [5,]  1 22 3.19 115 18
##   [6,]  1 25 3.19 110 19
##   [7,]  1 25 3.19 110 19
##   [8,]  1 25 3.19 110 19
##   [9,]  1 20 3.13 140 17
##  [10,]  1 22 3.13 160 16
##  [11,]  1 29 3.50 101 23
##  [12,]  1 29 3.50 101 23
##  [13,]  1 28 3.31 121 21
##  [14,]  1 28 3.31 121 21
##  [15,]  1 25 3.31 121 20
##  [16,]  1 22 3.62 182 16
##  [17,]  1 22 3.62 182 16
##  [18,]  1 20 3.62 182 15
##  [19,]  1 53 2.91  48 47
##  [20,]  1 43 3.03  70 38
##  [21,]  1 43 3.03  70 38
##  [22,]  1 41 2.97  68 37
##  [23,]  1 38 2.97  68 31
##  [24,]  1 30 3.03 102 24
##  [25,]  1 38 2.97  68 31
##  [26,]  1 38 2.97  68 31
##  [27,]  1 38 2.97  68 31
##  [28,]  1 30 3.03 102 24
##  [29,]  1 30 3.34  88 24
##  [30,]  1 24 3.60 145 19
##  [31,]  1 54 2.91  58 49
##  [32,]  1 38 2.91  76 31
##  [33,]  1 42 2.91  60 38
##  [34,]  1 34 2.91  76 30
##  [35,]  1 34 2.91  76 30
##  [36,]  1 34 2.91  76 30
##  [37,]  1 34 2.92  76 30
##  [38,]  1 33 3.15  86 27
##  [39,]  1 33 3.15  86 27
##  [40,]  1 33 3.15  86 27
##  [41,]  1 33 3.15  86 27
##  [42,]  1 28 3.15 101 24
##  [43,]  1 31 3.15 100 25
##  [44,]  1 29 3.31  78 24
##  [45,]  1 43 3.03  70 38
##  [46,]  1 43 3.03  70 38
##  [47,]  1 29 3.43  90 24
##  [48,]  1 19 3.63 176 15
##  [49,]  1 19 3.63 176 15
##  [50,]  1 17 3.54 262 13
##  [51,]  1 31 3.03  68 30
##  [52,]  1 38 3.03  68 31
##  [53,]  1 38 3.03  68 31
##  [54,]  1 38 3.03  68 31
##  [55,]  1 38 3.08  68 31
##  [56,]  1 23 3.33 101 17
##  [57,]  1 23 3.33 101 17
##  [58,]  1 23 3.33 101 17
##  [59,]  1 23 3.33 135 16
##  [60,]  1 32 3.39  84 26
##  [61,]  1 32 3.39  84 26
##  [62,]  1 32 3.39  84 26
##  [63,]  1 32 3.39  84 26
##  [64,]  1 42 3.39  64 36
##  [65,]  1 32 3.39  84 26
##  [66,]  1 27 3.76 120 19
##  [67,]  1 39 3.43  72 31
##  [68,]  1 25 3.58 123 22
##  [69,]  1 25 3.58 123 22
##  [70,]  1 25 3.58 123 22
##  [71,]  1 25 3.58 123 22
##  [72,]  1 18 3.46 155 16
##  [73,]  1 18 3.46 155 16
##  [74,]  1 16 3.80 184 14
##  [75,]  1 16 3.80 184 14
##  [76,]  1 24 3.78 175 19
##  [77,]  1 41 2.97  68 37
##  [78,]  1 38 2.97  68 31
##  [79,]  1 38 2.97  68 31
##  [80,]  1 30 3.03 102 24
##  [81,]  1 30 3.17 116 23
##  [82,]  1 32 3.35  88 25
##  [83,]  1 24 3.58 145 19
##  [84,]  1 24 3.59 145 19
##  [85,]  1 24 3.59 145 19
##  [86,]  1 32 3.35  88 25
##  [87,]  1 32 3.35  88 25
##  [88,]  1 30 3.17 116 23
##  [89,]  1 30 3.17 116 23
##  [90,]  1 37 3.15  69 31
##  [91,]  1 50 2.99  55 45
##  [92,]  1 37 3.15  69 31
##  [93,]  1 37 3.15  69 31
##  [94,]  1 37 3.15  69 31
##  [95,]  1 37 3.15  69 31
##  [96,]  1 37 3.15  69 31
##  [97,]  1 37 3.15  69 31
##  [98,]  1 37 3.15  69 31
##  [99,]  1 37 3.15  69 31
## [100,]  1 34 3.33  97 27
## [101,]  1 34 3.33  97 27
## [102,]  1 22 3.43 152 17
## [103,]  1 22 3.43 152 17
## [104,]  1 25 3.43 152 19
## [105,]  1 25 3.43 160 19
## [106,]  1 23 3.43 200 17
## [107,]  1 25 3.43 160 19
## [108,]  1 24 3.46  97 19
## [109,]  1 33 3.70  95 28
## [110,]  1 24 3.46  97 19
## [111,]  1 25 3.70  95 25
## [112,]  1 24 3.46  95 19
## [113,]  1 33 3.70  95 28
## [114,]  1 24 3.46  95 19
## [115,]  1 25 3.70  95 25
## [116,]  1 24 3.46  97 19
## [117,]  1 33 3.70  95 28
## [118,]  1 24 3.61 142 18
## [119,]  1 41 2.97  68 37
## [120,]  1 30 3.03 102 24
## [121,]  1 38 2.97  68 31
## [122,]  1 38 2.97  68 31
## [123,]  1 38 2.97  68 31
## [124,]  1 30 3.35  88 24
## [125,]  1 24 3.59 145 19
## [126,]  1 27 3.94 143 19
## [127,]  1 25 3.74 207 17
## [128,]  1 25 3.74 207 17
## [129,]  1 25 3.74 207 17
## [130,]  1 28 3.94 288 17
## [131,]  1 31 3.46  90 23
## [132,]  1 31 3.46  90 23
## [133,]  1 28 3.54 110 21
## [134,]  1 28 3.54 110 21
## [135,]  1 28 2.54 110 21
## [136,]  1 28 3.54 110 21
## [137,]  1 26 3.54 160 19
## [138,]  1 26 3.54 160 19
## [139,]  1 36 3.62  69 31
## [140,]  1 31 3.62  73 26
## [141,]  1 31 3.62  73 26
## [142,]  1 37 3.62  82 32
## [143,]  1 33 3.62  82 28
## [144,]  1 32 3.62  94 26
## [145,]  1 25 3.62  82 24
## [146,]  1 29 3.62 111 24
## [147,]  1 32 3.62  82 28
## [148,]  1 31 3.62  94 25
## [149,]  1 29 3.62  82 23
## [150,]  1 23 3.62 111 23
## [151,]  1 39 3.05  62 35
## [152,]  1 38 3.05  62 31
## [153,]  1 38 3.05  62 31
## [154,]  1 37 3.05  62 31
## [155,]  1 32 3.05  62 27
## [156,]  1 32 3.05  62 27
## [157,]  1 37 3.19  70 30
## [158,]  1 37 3.19  70 30
## [159,]  1 36 3.27  56 34
## [160,]  1 47 3.27  56 38
## [161,]  1 47 3.19  70 38
## [162,]  1 34 3.19  70 28
## [163,]  1 34 3.19  70 28
## [164,]  1 34 3.19  70 29
## [165,]  1 34 3.19  70 29
## [166,]  1 29 3.24 112 26
## [167,]  1 29 3.24 112 26
## [168,]  1 30 3.62 116 24
## [169,]  1 30 3.62 116 24
## [170,]  1 30 3.62 116 24
## [171,]  1 30 3.62 116 24
## [172,]  1 30 3.62 116 24
## [173,]  1 30 3.62 116 24
## [174,]  1 34 3.31  92 29
## [175,]  1 33 3.27  73 30
## [176,]  1 32 3.31  92 27
## [177,]  1 32 3.31  92 27
## [178,]  1 32 3.31  92 27
## [179,]  1 24 3.27 161 20
## [180,]  1 24 3.27 161 19
## [181,]  1 24 3.27 156 20
## [182,]  1 24 3.27 156 19
## [183,]  1 46 3.01  52 37
## [184,]  1 34 3.19  85 27
## [185,]  1 46 3.01  52 37
## [186,]  1 34 3.19  85 27
## [187,]  1 34 3.19  85 27
## [188,]  1 42 3.01  68 37
## [189,]  1 32 3.19 100 26
## [190,]  1 29 3.19  90 24
## [191,]  1 29 3.19  90 24
## [192,]  1 24 3.19 110 19
## [193,]  1 38 3.01  68 33
## [194,]  1 31 3.19  88 25
## [195,]  1 28 3.78 114 23
## [196,]  1 28 3.78 114 23
## [197,]  1 28 3.78 114 24
## [198,]  1 28 3.78 114 24
## [199,]  1 22 3.62 162 17
## [200,]  1 22 3.62 162 17
## [201,]  1 28 3.78 114 23
## [202,]  1 25 3.78 160 19
## [203,]  1 23 3.58 134 18
## [204,]  1 27 3.01 106 26
## [205,]  1 25 3.78 114 19

Koefisien Regresi

Mencari koefisien regresi

beta1=solve(t(X)%*%X)%*%t(X)%*%y
beta1
##          [,1]
## x0 -5990.5422
## x1  -722.5191
## x2  2954.9783
## x3   142.8725
## x4   664.9921

sehingga model regresi linear berganda yang diperoleh adalah yi=19.34429−0.01923X1i−0.031229X2i+2.714975X3i

Kemudian akan dicari y duga dari model yang diperoleh:

yhat <- X%*%beta1
head(yhat)
##          [,1]
## [1,] 14578.89
## [2,] 14578.89
## [3,] 17780.51
## [4,] 12293.07
## [5,] 15940.61
## [6,] 13723.68

Residual yang diperoleh:

res <- y-yhat
head(res)
##           [,1]
## [1,] -1083.894
## [2,]  1921.106
## [3,] -1280.512
## [4,]  1656.933
## [5,]  1509.391
## [6,]  1526.318

lihat rank dari matriks X:

##find n and rank, r
r <- qr(X)$rank
r
## [1] 5
## [1] 4
n <- dim(X)[1]
n
## [1] 205

Ragam Galat

Mencari ragam dari galat

yup = y-(X%*%beta1)
yupt = t(yup)
ragam = (yupt%*%yup)/(n-5)
ragam
##          [,1]
## [1,] 20312127

mencari ragam dari beta:

library(MASS)
## Warning: package 'MASS' was built under R version 4.2.3
var.beta <- as.numeric(t(res)%*%res/(n - r))*ginv(t(X)%*%X)
var.beta
##             [,1]         [,2]         [,3]        [,4]       [,5]
## [1,] 38882467.34 -269548.7654 -7773667.850 -23583.0699 -85434.341
## [2,]  -269548.77   37771.6614    33018.681   -212.5426 -38850.503
## [3,] -7773667.85   33018.6807  2192363.636  -4544.2262  -2720.176
## [4,]   -23583.07    -212.5426    -4544.226    188.0009   1018.104
## [5,]   -85434.34  -38850.5027    -2720.176   1018.1037  46915.667

Selang Kepercayaan

Mencari selang kepercayaan dari koefisien regresi:

alpha <- 0.10 #alpha 5%
t <-qt(1 - alpha/2, n - r) #nilai t tabel
conf.int <- round(cbind(beta1 - t*sqrt(diag(var.beta)), beta1 + t*sqrt(diag(var.beta))), 5) #5 itu artinya 5 angka dibelakang koma
conf.int
##           [,1]      [,2]
## x0 -16294.8899 4313.8055
## x1  -1043.6829 -401.3552
## x2    508.1703 5401.7863
## x3    120.2143  165.5306
## x4    307.0585 1022.9258

cek jawaban menggunakan syntax model dari package R

#fit model with standard R lm package
r.fit <- lm(y ~ x1 + x2 + x3 + x4)
#show confidence intervals in R
round(confint(r.fit, names(r.fit$coef), level = 0.90), 5)
##                     5 %      95 %
## (Intercept) -16294.8899 4313.8055
## x1           -1043.6829 -401.3552
## x2             508.1703 5401.7863
## x3             120.2143  165.5306
## x4             307.0585 1022.9258

Plotting antar variabel x dengan y

Melihat plot hubungan X1 dan Y

plot(x1, y, main= "Hubungan Highwaympg and Price",
     xlab = "Highwaympg", ylab = "Price")

Melihat plot hubungan X2 dan Y

plot(x2, y, main= "Hubungan Boreratio and Price",
     xlab = "Boreratio", ylab = "Price")

Melihat plot hubungan X3 dan Y

plot(x3, y, main= "Hubungan Horsepower and Price",
     xlab = "Horsepower", ylab = "Price")

Melihat plot hubungan X4 dan Y

plot(x4, y, main= "Hubungan Citympg and Price",
     xlab = "Citympg", ylab = "Price")

Plot var important

library(caret)
## Warning: package 'caret' was built under R version 4.2.3
## Loading required package: ggplot2
## Warning: package 'ggplot2' was built under R version 4.2.3
## Loading required package: lattice
poc <- varImp(r.fit)
poc
##      Overall
## x1  3.717631
## x2  1.995713
## x3 10.420020
## x4  3.070136

Dari hasil tersebut, terlihat bahwa x3 (Horsepower) memiliki nilai yang paling besar, artinya x3 merupakan variabel important yaitu variabel yang paling mempengaruhi y (price).