Number of Minutes

Dollar Sales

 

of Radio

 

Advertising

(y-values,

 

(x-values,

SALES)

 

MINUTES)

 

 

 

 

Week 1

2

$1,400

Week 2

1

$ 920

Week 3

3

$1,100

Week 4

5

$2,265

Week 5

5

$2,890

Week 6

4

$2,200

 

 

 

BJ’s wants to determine whether there is a linear relationship between the amount of radio advertising and the weekly sales. If a strong relationship exists, BJ’s wants to use the relationship to forecast sales. A graph of the data looks like this:

y

3,000

2,000

SALES in Dollars

1,000 B

0 1

(forecasted)

 

8

 

.8

 

5

2

4

 

＝

 

M

 

x

2

3

4

5

6

7

 

 

of Advertising

 

10: Running Total and Statistics 135

File name : English-M02-1-040308(Print).doc Print data : 2004/3/9