Tyler 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) 32 43 65 77 83 89 91 99 Hours (y) 5.2 5.8 2.9 2.6 0.7 3.6 2 1.7 9 8 7 6 5 Hours H 3 4 2 7 10 20 30 40 50 60 70 80 90 Brightness Level 100 11 q a) Find the equation for the line of best fit. Keep at least 4 decimals for each parameter in the equation.