Question: {** Note : Some variables require transformation. For 8.4-8.5, use log(y), log(x1) and log(x10). For 8.16, use the squared root of Inhibit.}

Consider the automobile gasoline mileage data in Table B.3.

1. Build a linear regression model relating gasoline mileage y to vehicle weight x10 and the type of transmission x11.  Does the type of transmission significantly affect the mileage performance?
2. Modify the model developed in part a to include an interaction between vehicle weight and the type of transmission on gasoline mileage?  Interpret the parameters in this model.

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