A recent article in Bloomberg Businessweek listed the "Best Small Compa- nies." We are interested in the current results of the companies' sales and earnings. A random sample of 12 companies was selected and the sales and earnings, in millions of dollars, are reported below. Sales Earnings ($ millions) ($ millions) Company Sales Earnings ($ millions) ($ millions) Company Papa John's International Applied Innovation Integracare $89.2 $4.9 Checkmate Electronics $17.5 $ 2.6 18.6 4.4 Royal Grip 11.9 1.7 18.2 1.3 M-Wave 19.6 3.5 Wall Data 71.7 Serving-N-Slide Daig 8.0 51.2 8.2 Davidson & Associates 58.6 6.6 28.6 6.0 Chico's FAS 46.8 4.1 Cobra Golf 69.2 12.8 a. Draw a scatter diagram. b. Compute the correlation coefficient. c. Determine the regression equation. d. For a small company with $50.0 million in sales, estimate the earnings.

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