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A textbook publisher for books used in business schoolsbelieves that the number of books sold is related to the number ofcampus visits to decision makers made by their sales force. Asampling of the number of sales calls made and the number of bookssold is shown in the following table.

# OF SALES CALLS MADE ----- # OF BOOKS SOLD

25 375

15 250

25 525

45 825

35 550

25 575

25 550

35 575

25 400

15 400

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Sales Calls Made Versus Number of Books SoldSummary

Measure Value

Error Measures

Cummulative For. Error = 0

MAD = 72.5

MSE = 5550.986

Standard Error (denom=n=8) = 83.299

MAPE = 0.163

Regression Line

Books Sold = 104,605

+ 14.737 * Sales Calls Made

Statistics

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1. What percent in the variation of the variable BooksSold is explained by the value of the variable Sales CallsMade?

A) 86.5%

B) 83.3%

C) 74.8%

D) 72.5%

2. For every sale call made, the number of books soldincreases by:

A) 14.74 books.

B) 104.6 books.

C) 83.30 books.

D) 7.25 books.

3. If a sales representative makes 55 sales calls, thenumber of book sales the publisher should expect is:

A) 105.

B) 4,581.

C) 114.

D) 915.

4. To realize the sale of 700 books, how many salescalls will the sales representative have to make?

A) 40.4

B) 45.9

C) 32.7

D) 37.6

Please provide explantions and/or show your work.