Based on the data shown below, calculate the correlation coefficient and the equation of the least squares line. Round all numerical values to three decimal places as needed.
x y
3 31.08
4 28.22
5 28.96
6 26.1
7 21.44
8 21.58
9 19.62
10 16.76
11 12.4
(a) What is the correlation coefficient?
`r =`
(b) What is the equation of the least squares line?
`y =`
`x + `