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Plot a scatter diagram find the equation of the regression

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Reference no: EM131415756

A study was made by a retail merchant to determine the relation between weekly advertising expenditures and sales. 
Advertising Costs ($) Sales ($) 

40 385 
20 400 
25 395 
20 365 
30 475 
50 440 
40 490 
20 420 
50 560 
40 525 
25 480 
50 510 

(a) Plot a scatter diagram. 

(b) Find the equation of the regression line to predict weekly sales from advertising expenditures. 

(c) Estimate the weekly sales when advertising costs are $35 

Reference no: EM131415756

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