# 1) On a plot of position x versus time t for an object’s motion, what corresponds to the object’s velocity at any given instant t1?

A. slope at the point on the plot corresponding to t1

B. intercept on the horizontal axis

C. inverse of the slope at the point on the plot corresponding to t1

D. intercept on the vertical axis

2) On a plot of position x versus time t for an object’s motion, what corresponds to the object’s average velocity between instant t1 and instant t2?

A. inverse of the slope of a line connecting the corresponding points on the plot

B. intercept of the plot on the vertical axis

C. intercept of the plot on the horizontal axis

D. slope of a line connecting the corresponding points on the plot

For Number 2, I think the answer is D. But I am not sure. Could you please provide an explanation to your answer? I really want to understand this concept.