How do I find the regression equation given the data ?

Problem 8. An emergency service wishes to determine whether a relationship exists between the shown. outside temperature and the number of emergency calls it receives for a 7-hour period. The data are Temperature x * = 125/5 No. Of calls y 25 X ; - x ) 1 5 x ly; - > > / syl ( x - > >/s, - (yi- q) By 7 25 10 - 0. 3 65 2 01060 0 4 0. 0 0 0 0 - 1 146 06 2, 457 2 7 = 40 / 5 27 - 1. 6823 8 30 0. 2243 8 10 33 D. 5608 0.7 303 D . 4 096 11 0 .9129 Ex 125 0. 8472 10955 Ly 40 2 = 3. 8497 8a) Find the correlation coefficient r? Show all your steps. Do not round off. (6 points) = (1-) T = 0. 9624 2 (x - * )/5x. (4-9)/sy ( 1 1 (5 - 1) . 3. 2497 8b) Find the regression equation? Show all your steps. (10 points) 1 = 0. 9624