20. Below is a sample of five patients at a hospital with the information regarding their
height and weight.
Height
(in)
Weight
(lbs)
67
155
72
220
77
240
74
195
69
175
Weight, pounds
250
200
150
100
66 68 70 72 74 76 78
Height, inches
a. Find the correlation coefficient, $r$ and $r^2$. And explain the meaning of the $r^2$.
b. Find equation of the least squares regression line.