Data regarding the value of a particular color copier is representing in the graph. Find the rate of change of the value with respect to time, in dollars per year.

Question

The line goes from 8 vertical to 10 horizontal. The points on the graph are on the value 4 and 8 for time
The rate of change of the value with respect to time is how many dollars per year.

Answer 1

Your description of the points is lacking.

Define the points as (x1,y1) and (x2, y2)

Then rate of change is slope, or equal to

(Y2-y1)/(x2-x1)