Rory records the percentage of battery life remaining on his phone throughout a day. the graph represents the percentage of battery life remaining after a certain number of hours.
a graph titled phone battery life. the horizontal axis shows elapsed time (hours) numbered 2 to 20, and the horizontal axis shows battery life (%) numbered 10 to 120. a line begins at 100% in 0 hours, to 20% in 8 hours, to 100% from 10 to 12 hours, to 60% in 16 hours, to 100% from 17 to 20 hours.
at which times could rory's phone have been plugged into the charger? select three options.
6 hours
9 hours
11 hours
14 hours
19 hours

9 hours , 11 hours, 19 hours.

Step-by-step explanation:

In the give graph, we observe that the graph has both rise and fall.

The fall part is describing that battery life is decreasing and the rising part is describing that battery life is increasing.

During charging , the battery life rises.

Then, the hours comes under the rising or constant part are describing the time Rory's phone could have been plugged into the charger.

From the given options, the times at which this is happening = 9 hours , 11 hours, 19 hours.

you need a common difference between consecutive terms to be constant, like 1,2,3,4 or 2,4,6,8, or 1,3,6,9

the graph in the attached figure

step-by-step explanation:

we have

using a graphing tool

the graph in the attached figure

the roots are ( x-intercepts) x=-0.5,x=1,x=3

the y-intercept is the point (0,3)