John 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) 19 6.7 24 8 34 3.5 53 5.6 71 4.3 75 1.7 91 2.6 99 1.2 10- Hours 20 30 40 50 60 70 80 90 100 19 a) Find the equation for the line of best fit. Keep at least 3 decimals for each parameter in the equation. (You should begin by typing y=) b) Interpret the slope in context. John should expect -0.0667 brightness level per hour. John should expect -0.0667 hours per brightness level. c) What does the equation predict for the number of hours the phone will last at a brightness level of 49? hours Question Help: Message instructor Submit