Question: Cars, more efficient? Here is a scatterplot of the residuals from the regression in Exercise R2.18: a) Does the residual plot suggest that the regression

Cars, more efficient? Here is a scatterplot of the residuals from the regression in Exercise R2.18:

a) Does the residual plot suggest that the regression conditions were satisfied? Explain.
In the United States, fuel efficiency is usually measured as we did here, in miles per gallon. But in the rest of the world, the common measure is the reciprocal. There the measure is liters /100 km. The equivalent in U.S. terms is gallons per 100 miles. Here are a new regression model using Gallons/100Miles as the response variable and the corresponding residual plot:

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