To find average velocity from a distance versus time graph, calculate the slope of the line at any point. For multiple velocities, use a weighted average by multiplying each velocity by the time it was held, summing these values, and dividing by total time. Alternatively, a simpler method involves subtracting the initial position from the final position and dividing by the total time. This straightforward approach effectively yields the average velocity without complex calculations. Understanding these methods is essential for accurately interpreting data graphs.