What was the instantaneous velocity at 225

Question

The following graph shows the motion of a bus. When calculating the velocities in the questions below, do so in units of km/h.

1. Determine the velocity of the bus from 0.00 h to 1.00 h.
2. What was the average velocity of the bus over the whole 2.50 h?
3. Compare the motion of the bus in Parts A and B. In your answer, discuss the direction in which the buses are moving, and compare the magnitudes of their velocities.
4. What was the instantaneous velocity at 2.25 h?