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12.8 (a) Interpret the slope of the fitted regression Sales = 842 37.5 Price. (b) If Price = 20, what is the prediction for Sales?

12.8 (a) Interpret the slope of the fitted regression Sales = 842 − 37.5 Price. (b) If Price = 20, what is
the prediction for Sales? (c) Would the intercept be meaningful if this regression represents DVD
sales at Blockbuster?
12.9 (a) Interpret the slope of the fitted regression Home Price = 125,000 + 150 Square Feet. (b) What
is the prediction for Home Price if Square Feet = 2,000? (c) Would the intercept be meaningful if
this regression applies to home sales in a certain subdivision?

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