1.) Description & Variables

The data was extracted from the 1974 Motor Trend US magazine, and comprises fuel consumption and 10 aspects of automobile design and performance for 32 automobiles (1973–74 models).

Tip: Use ?mtcars for more information!

  • mpg: Miles/(US) gallon
  • cyl: Number of cylinders
  • disp: Displacement (cu.in.)
  • hp: Gross horsepower
  • drat: Rear axle ratio
  • wt: Weight (1000 lbs)
  • qsec: 1/4 mile time
  • vs: Engine (0 = V-shaped, 1 = straight)
  • am: Transmission (0 = automatic, 1 = manual)
  • gear: Number of forward gears
  • carb: Number of carburetors

2.) How is MPG Calculated?

mpg describes the miles per gallon. This function uses the following formula to calculate miles per US gallon:

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

3.) Which MPG rates are the most common?