A marble rolls across the floor and determines its distance (in meters) every second for 10 seconds. This graph shows time along the x-axis and distance along the y- axis. Use this information to answer the question. What is the average speed of the marble as it rolls across the floor? Marble Graph 15 13 12 11 10 Distance (m) Y-axis 7 6 5 4 3 2 1 0 1 2 3 10 4 5 6 7 8 9 X-axis Time(s) Average Speed (8 = total distance total elapsed time​