x	20.8	15.6	20.4	18.0	16.4	15.5	14.7	17.1
y	87.2	72.0	94.7	85.9	79.0	75.2	69.7	82.0

x	15.4	16.2	15.0	17.2	16.0	17.0	14.4
y	69.4	83.3	79.6	82.6	80.6	83.5	76.3

x = 249.7, y = 1201, x² = 4206.67, y² = 96,817.34, xy = 20,143.79, and r 0.8338.

1. Findx, andy. Then find the equation of the least-squares line=a+bx. (Round your answer to four decimal places.)

2. What is the predicted temperature when x = 18.6 chirps per second? (Round your answer to two decimal places.)