Hours 3 2 1 Brightness Level (x) Hours (y) 30 37 39 42 5.3 4.1 6.3 6.8 43 5.9 4.5 55 85 89 92 3.2 2.4 10- 9 7 6 5 8 10 20 30 -1 40 50 60 70 Brightness Level 80 90 100 11 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. I Ashton should expect -0.0439 hours per brightness level. Ashton should expect -0.0439 brightness level per hour. c) What does the equation predict for the number of hours the phone will last at a brightness lev of 42? hours