Complete the following worksheet and then use it to calculate the coefficient of determination. (9,- y)² 2.208 565.203 432.765 79.477 797.046 178.837 973.690 1,856.834 2,121.800 35.331 Yi ŷ 1 15 160 175.486 2 13.5 220 197.774 3 16.5 140 153.197 4 14.5 190 182.915 5 17 120 145.768 6 16 160 160.627 7 13 200 205.204 8 18 150 130.909 9 12 210 220.063 10 15.5 190 168.056 Total The coefficient of determination (²) is (3k - y)² 196.000 2,116.000 1,156.000 256.000 2,916.000 196.000 676.000 576.000 1,296.000 256.000 According to the regression model, which of the following is the best estimate together with the 95 percent prediction interval of paint sales (in housands of gallons) in a sales region where the selling price is $12.50? 212.620 + 2(3.190) 409.370 2(3.190) 212.620 2(18.017) 409.370 + 2(18.017) What is the price elasticity of demand at a selling price of $12.50?

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