Answer:
2 percent per minute
Step-by-step explanation:
The rate at which the battery was charged is equivalent to the rate of change of this relationship. In linear relationships, the rate of change is represented by the slope of the line. We can calculate this slope from any two points on the line. Two points whose coordinates are clearly visible from the graph are (0,40) and (5,50). Now, to find the slope, let's take the ratio of the corresponding differences in the y-values and the x-values: 50-40/5-0=10/5=2. The slope of the line is 2, which means the battery was charged at a rate of 2 percent per minute.
