car mpg with other attributes
8 variables:
1.- MPG (miles per gallon)
2.- cylinders
3.- engine displacement (cu. inches)
4.- horsepower
5.- vehicle weight (lbs.)
6.- time to accelerate from O to 60 mph (sec.)
7.- model year (modulo 100), and
8.- origin of car (1. American, 2. European,3. Japanese).