Question

Review the graph below, which plots total distance traveled versus time of travel for a moving object.

Image

Why do the values on the graph form a straight line?
A.
The speed is constant.

B.
The distance remains unchanged.

C.
The direction of motion stays the same.

D.
The speed gradually increases over time.

Answer 1

A. The speed is constant.

The fact that the graph forms a straight line indicates that the object is traveling at a constant speed. This means that the distance traveled by the object increases linearly with time. If the speed was changing - either gradually increasing or decreasing - the graph would not be a straight line.