Question

A position-time graph is shown for a motorcycle driving south.

A graph titled Position versus Time with position in kilometers on the y axis, numbered 30 to 150, and time in hours on the x axis, numbered 0 to 5. The graph is a straight line from the the origin to a point (5, 150).
According to the graph, what is the motorcycle’s average velocity?

5 km/h south
24 km/h south
120 km/h south
150 km/h south

Answer 1

Average velocity = Δposition / Δtime = (150 km − 30 km) / 5 h = 120 km / 5 h = 24 km/h.
Direction: south.