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45 votes
45 votes
A battery is charged.

The percentage of the battery's capacity that is charged as a function of time (in minutes) is graphed.

At what rate is the battery charged?
Choose 1 answer:

A. 2 percent per minute

B. 1 percent per minute

C. 10 percent per minute

D. 20 percent per minute

User Jon Ander
by
2.6k points

1 Answer

17 votes
17 votes

Every 6 minutes, 12 percent is added to the capacity.

You can see on the graph that the charged percentage of capacity changes from 40 to 50 in 5 minutes. Then the increase in 6 minutes will be slightly more than 10 percent.

The linear rate is (10%)/(5 min) = 2%/min, so in 6 minutes it will be

(2%/min)×(6 min) = 12%

This calculation is consistent with our observation from the graph.

Every 6 minutes, 12 percent is added to the capacity.

The following question may be like this:

A battery is charged. The percentage of the battery’s capacity that is charged as a function of time (in minutes) is graphed.

How many percentage are added every 6 minutes?

A- 12 percent

B- 6 percent

C- 10 percent

D- 2 percent

A battery is charged. The percentage of the battery's capacity that is charged as-example-1
User Izzie
by
3.4k points