A trolley moves along a horizontal track. The distance of the trolley from its starting point was measured every second for 8 seconds. The results are shown in the graph below.…

A trolley moves along a horizontal track. The distance of the trolley from its starting point was measured every second for 8 seconds. The results are shown in the graph below. (a) Distance (m) 1.5- Calculation 1.2 0.9- 0.6- 0.3 1 2 3 4 Time (s) 5 6 7 Calculate the average speed of the trolley. Include the unit for your answer