Miguel 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) 26 32 37 38 54 69 79 91 Hours (y) 6.8 6.1 5.2 2.9 3 3.5 2.9 3.7 Hours 10 20 30 40 50 60 70 80 90 100 11 Brightness Level a) Find the equation for the line of best fit. Keep at least 4 decimals for each parameter in the equation. b) Interpret the slope in context. O Miguel should expect -0.0427 hours per brightness level. O Miguel should expect -0.0427 brightness level per hour. c) What does the equation predict for the number of hours the phone will last at a brightness level of 267 hours