(c) Use a calculator to verify that $\sum x = 60$, $\sum x^2 = 1,010$, $\sum y = 632$, $\sum y^2 = 89,230$, and $\sum xy = 9,117$.
Compute r. (Round your answer to four decimal places.)
r = 0.9305
X
As x increases from 3 to 25 months, does the value of r imply that y should tend to increase or decrease? Explain