The percentage of battery remaining after a certain number of hours after a cellphone is turned on can be represented by the graph shown.
110 y
100
90
80
70
60
50
40
Percent
of
Battery
Remaining
30
20
10
0
1
2 3
5
6 7 8 9 10 11 12 13
Number of Hours
4
Part A: Write an equation in slope-intercept form to describe the relationship in the graph. (2 points)
Part B: Explain how you determined the equation. (1 point)
Part C: What is the meaning of the slope in the given situation? (1 point)

PLEASE EXPLAIN EVERYTHINGG!