2.266 Predicting Highway MPG Use the data in Cars2020 to fit a regression line
to predict the highway gas mileage (HwyMPG) of car models using the mileage rating
for city driving (CityMPG).
a. Write down the prediction equation and interpret the slope in the context of this
data situation.
b. The Toyota Corolla is rated at 23 mpg in the city and 40 mpg on the highway. Find
the residual for the Corolla for this fitted model.