Position versus time
graph of position versus time with position on y axis from 0 to 120 miles and time on x axis from 0 to 5 hours. segment 1 goes from 0, 0 to 1, 20. segment 2 goes from 1, 20 to 2, 40. segment 3 goes from 2, 40 to 3, 70. segment 4 goes from 3, 70 to 5, 85.
an object began moving at the starting point (0, 0) on the graph. the average speed (in mph) of the object for the entire trip of 5.0 hours is

15 mph
17 mph
19 mph
20.0 mph
22 mph