Cars, fuel efficiency Consider a regression to predict the fuel efficiency (as miles per gallon, MPG) of the cars in the Cars data file. Here is one regression model using the Weight and the Drive Ratio:

a) What is the interpretation of the coefficient of Weight in this model?

b) Do you think this is a successful model for predicting the fuel efficiency of a car?

c) These cars were measured more than two decades ago.
Do you think this model should apply to more modern cars? What exceptions would you suggest?

R squared Response variable is: MPG 89.5% s = 2.186 Variable Coefficient Intercept 70.9191 Weight -10.8315 Drive Ratio -4.89716