Annual high temperatures in a certain location have been tracked for several years. Let $\displaystyle {X}$ represent the year and $\displaystyle {Y}$ the high temperature. Based on the data shown below, calculate the correlation coefficient (to three decimal places) between $\displaystyle {X}$ and $\displaystyle {Y}$. Use your calculator!

x	y
1	36.96
2	33.92
3	33.68
4	29.84
5	30.3
6	25.06
7	24.72
8	20.78
9	17.34
10	15.9
11	14.66
12	12.82
13	10.38
14	8.04
15	3.2

$\displaystyle {r}=$