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4-65.

Your teacher will provide you with a model of this graph. A consumer magazine collected the following data for the fuel efficiency of cars (miles per gallon) compared to weight (thousands of pounds).

  • is the weight (s of pounds)

  • and is the fuel efficiency (mpg).

  1. Describe the association between fuel efficiency and weight.

    Moderately strong negative linear association with no apparent outliers.

  2. Cheetah Motors has come out with a super lightweight sports utility vehicle (SUV) that weighs only pounds. What does the model predict the fuel efficiency will be?

    Use the graph to come up with a prediction of the fuel efficiency of the new SUV.