x

13.1

28.8

24.5

14.3

7.5

27.7

16.2

20.1

y

23

71

39

23

15

30

15

25

(b)Use a calculator to verify that(x) =152.2,(x²) =3295.78,(y) =241,(y²) =9595and(x y) =5319.5.

Computer. (Enter a number. Round to 3 decimal places.)

r=___

Asxincreases, does the value ofrimply thatyshould tend to increase or decrease? Explain your answer.

a. Given our value ofr,yshould tend to remain constant asxincreases.

b. Given our value ofr,yshould tend to increase asxincreases.

c. Given our value ofr,yshould tend to decrease asxincreases.

d. Given our value ofr, we can not draw any conclusions for the behavior ofyasxincreases.