Question 9 0/2 pts 9 10 4 0 Details Manuel is investigating how long his phone's battery lasts (in hours) for various brightness levels (on a scale of 0-100). His data is displayed in the table and graph below. Brightness Level (x) Hours (y) 17 6.2 33 4.6 38 3.9 64 4.8 78 2.9 82 2.6 tours 10 20 30 40 50 60 70 80 90 109 714 Calculate the correlation coefficient. Round accurately to at least three decimals. Use the correlation coefficient to describe the strength and direction