Question

The graph above shows the distance a tow truck is away from the company's base.

What is the rate of change of change from hour 4 to hour $7 ?

Answer 1

Answer is -20 rate of change

Step by step

We can see the points on the line at 4 is at (4, 120) and hour 7 is at (7, 60)

We can find slope or rate by using slope formula y2 - y1 over x2 - x1

60 - 120 over 7 - 4
-60 over 3
-60/3 = -20
Rate of change is -20

You can also find rate of change or slope by looking at your graph. From (4, 120) point down to the horizontal line for point (7, 60) we find rise over run is down -60 over right 3 for a slope of -20.