Refer to exercise 9 where the following data were used to investigate the relationship between the number of cars in service (1000s) and the annual revenue ($millions) for six smaller car rental companies (auto Rental News website, August 7, 2012).

With x = 5 cars in service (1000s) and y = annual revenue ($millions), the estimated regression equation is y = €“ 17.005 + 12.966x. For these data, SSE = 1043.03.
a. Compute the coefficient of determination r2.
b. Did the estimated regression equation provide a good fit? Explain.
c. What is the value of the sample correlation coefficient? Does it reflect a strong or weak relationship between the number of cars in service and the annualrevenue?

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Company U-Save Auto Rental System, Inc. Payless Car Rental System, Inc. ACE Rent A Car Rent-A-Wreck of America Triangle Rent-A-Car Affordable/Sensible Cars (1000s) 11.5 10.0 9.0 5.5 4.2 3.3 Revenue (Smillions) 118 135 100 37 40 32