High-low method, regression analysis. Anna Martinez, the financial manager at the Casa Real restaurant is checking to see if there is any relationship between newspaper

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High-low method, regression analysis. Anna Martinez, the financial manager at the Casa Real restaurant is checking to see if there is any relationship between newspaper advertising and sales revenues at the restaurant She obtains the following data for the past 10 months: She estimates the following regression equation: Monthly revenues = $39,502 + ($8.723) Advertising costs) . Use the high-low method to compute the function, relating advertising costs and revenues. . Using (a) the regression equation and (b) the high-low equation, what is the increase in revenues for each $1,000 spent on advertising within the relevant range? Which method should Martinez use to predict the effect of advertising costs on revenues? Explainbriefly