Below Is the Graph of the Velocity, in Feet Per

Multiple Choice

Below is the graph of the velocity, in feet per second, of a hat that is thrown up in the air from ground level.Positive velocity means upward motion. [Note that this is the graph of velocity, not distance.] About how big is the average speed over the first 4 seconds?

A) 13.1 ft/sec
B) 10.8 ft/sec
C) 6.8 ft/sec
D) 4.4 ft/sec