Section 1

mpg: Miles per gallon
cyl: Number of cylinders
disp: displacement
hp: Gross horsepower
drat: Rear axle ratio
wt: Weight
qsec: 1/4 mile time
vs: type of engine (0 = V-shaped, 1 = straight)
am: Transmission (0 = automatic, 1 = manual)
gear: number of forward gears
carb: = nmmber of carburetors

Section 2

\[mpg = \frac{miles\;traveled}{gallon\;of\;gas}\]

Section 3