Question: Speed. How does the speed at which you drive affect your fuel economy? To find out, researchers drove a compact car for 200 miles at

Speed. How does the speed at which you drive affect your fuel economy? To find out, researchers drove a compact car for 200 miles at speeds ranging from 35 to 75 miles per hour. From their data, they created the model Fuel Efficiency * 32 + 0.1 Speed and created this residual plot:

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