Question

The graph below plots a function f(x):

graph of line segment going through ordered pairs 0, 100 and 3, 220

If x represents time, the average rate of change of the function f(x) in the first three seconds is...

Answer 1

40 units per sec

Explanation:

The average rate of change in this case is the change in y over the first three seconds (which is 220 - 100, or 120) divided by the elapsed time (which is 3 seconds).

120

Thus, we have ------------ = 40 units per sec

3