Using graph a in figure 11-2 calculate the average speed of the object in motion from 12 s to 20 s explain your calculation

Average speed = 50m/s
Step by step explanation:
(x1,y1)=(12,200)
(x2,y2)=(20,600)
Speed
=Gradient
=y2-y1/x2-x1
=600-200/20-12
=400/8
=50m/s