6. An emergency service wishes to determine whether a relationship exists between the outside temperature and the number of emergency calls it receives for a 7-hour period. The data are shown. (25 points) Temperature X 25 10 27 30 33 No. of calls y 7 8 10 11 a) Find the correlation coefficient r (if you use any software or online calculator, please take the screenshot. You will get extra points if you do by hand.) b) Find the regression equation (If you use any software or online calculator, please take the screenshot. You will get extra points if you do by hand.) c) Graph the regression equation. (If you use any software or online calculator, please take the screenshot. You will get extra points if you do by hand.)