Is the amount of money spent by companies on advertising a function of the total sales of

Question:

Is the amount of money spent by companies on advertising a function of the total sales of the company? Show are sales income and advertising cost data for seven companies published by Advertising Age.

Use the data to develop a regression line to predict the amount of advertising by sales. Compute se and r2. Assuming = .05, test the slope of the regression line. Comment on the strength of the regressionmodel.