Question: Read, analyze and do what is asked. A study was made by a retail merchant to determine the relation between weekly advertising expenditures and

Read, analyze and do what is asked. A study was made by

Read, analyze and do what is asked. A study was made by a retail merchant to determine the relation between weekly advertising expenditures and sales. Advertising Costs ($) 40 20 25 20 30 50 40 20 50 40 25 50 Sales ($) 385 400 395 365 475 440 490 420 560 525 480 510 (a) Plot a scatter diagram. (b) Find the equation of the regression line to predict weekly sales from advertising expenditures. (show solutions) (c) Estimate the weekly sales when advertising costs are $35.

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