Here are advertised horsepower ratings and expected gas mileage for several 2007 vehicles as reported by Kelly

Part A: The linear function for this data is f(x)= -0.0838x + 46.868.
The predicted gas mileage for the Volkswagen Beetle is

34.3
and the residual is

-4.3
Part B: If we add the McLaren F1 to our data set, it has a horsepower of
627, the residual for this car would be

17.7 as the actual gas mileage recorded is 12 mpg.
-5.7 as the actual gas mileage recorded is 12 mpg.
12 as the actual gas mileage recorded is 12 mpg.