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In problem 12.10, you were asked to develop the equation of a regression model to predict the sales by the amount spent on mobile advertisements. Using this regression model and the data given in problem 12.10 (and provided here again), solve for the predicted values of 
 and the residuals. Comment on the size of the residuals.
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Order Paper NowProblem 12.10
The Swedish research institute Berg Insight estimated that mobile marketing and advertising sales would grow from 1.3 billion euros to 10 billion euros between 2009 and 2015. But is mobile advertising effective in increasing sales? Suppose the data below are pairs of the amount spent on mobile advertisements and the amount of sales for a nine-year period for an online retailer. Use these data to develop the equation of the regression model to predict the amount of sales by the amount spent on mobile advertisements. Discuss the meaning of the slope.
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