A paper described a study that examined whether stress accelerates aging at a cellular level. The accompanying data on a measure of perceived stress (x) and telomere length (y) were read from a scatterplot that appeared in the paper. Telomere length is a measure of cell longevity. Perceived Telomere Perceived Telomere
stress length stress length
5 1.01 20 1.79
6 1.04 20 1.07
6 1.1 20 0.95
7 0.98 21 1.07
10 1.64 21 1.82
11 1.31 21 1.46
12 0.98 22 1.55
13 1.4 22 1.91
14 1.19 22 0.89
14 0.92 23 2.03
15 1.7 24 1.04
15 1.43 24 1.46
15 1.49 25 1.82
17 1.07 26 1.16
17 1.01 27 1.7
17 1.55 27 1.97
18 1.25 28 1.22
18 1.43 29 1.88
19 1.67 33 0.92
(a) Compute the equation of the least-squares line. (Round all answers to the nearest thousandth.)
=
(b) What is the value of r2?