Scatter plot (Dataset 1)

data=read.table('Dataset 1 (tugas regnon).txt',header=T)
data

##      Y  X1   X2   X3
## 1 57.5  78 2.75 29.5
## 2 52.8  69 2.15 26.3
## 3 61.3  77 4.41 32.2
## 4 67.0  88 5.52 36.5
## 5 53.5  67 3.21 27.2
## 6 62.7  80 4.32 27.7
## 7 56.2  74 2.31 28.3
## 8 68.5  94 4.30 30.3
## 9 69.2 102 3.71 28.7

library(ggplot2)
plot(data$X1, data$Y,
     main = "Scatter Plot X1 vs Y",
     pch  = 20,
     xlab = "X1",
     ylab = "Y")
abline(lm(Y ~ X1, data = data), col = "red", lwd = 2)

library(ggplot2)
plot(data$X2, data$Y,
     main = "Scatter Plot X2 vs Y",
     pch  = 20,
     xlab = "X2",
     ylab = "Y")
abline(lm(Y ~ X2, data = data), col = "red", lwd = 2)

library(ggplot2)
plot(data$X3, data$Y,
     main = "Scatter Plot X3 vs Y",
     pch  = 20,
     xlab = "X3",
     ylab = "Y")
abline(lm(Y ~ X3, data = data), col = "red", lwd = 2)