Ryan is investigating how long his phone's battery lasts (in hours) for various brightness levels (on a scale of 0-100).

[answerhappygod]

Ryan Is Investigating How Long His Phone S Battery Lasts In Hours For Various Brightness Levels On A Scale Of 0 100 1 (407.52 KiB) Viewed 31 times

Ryan 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. 32 43 49 53 69 79 86 92 Brightness Level (x) Hours (y) 5.7 5.3 4.4 3.8 2.8 2.3 3.2 2.8 9 8 7 6 5 1 Hours 3 2 1 10 20 30 70 80 90 100 111 -1 40 50 60 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 Ryan should expect -0.0513 brightness level per hour. O Ryan should expect -0.0513 hours per brightness level. c) What does the equation predict for the number of hours the phone will last at a brightness level of 86? hours d) What is the residual for the point (86,3.2)? hours