How do you mean? I mean, physic professors teach physics...
Answer:
The Y-axis in a Velocity/Time graph is the Velocity.
Explanation:
The speed is the velocity. Like in math, speed(velocity)=distance over time. Where time is the X-axis.
Answer:
Each jump covers one center of the square to the other. If you can imagine the scenario, a single jump would cover a length of the side of one whole square. So, if it took three jumps, the total distance would be
d = 3 * 5 cm
d = 15 cm
Therefore, the magnitude or distance is 15 cm. The displacement depends on the direction of motion.