Question

A horizontal line on a distance-time graph means the object is

a. moving at a constant speed.
b. moving faster.
c. slowing down.
d. at rest.

Answer 1

At rest because if the distance is not changing, then it is not moving any further, so it must not be moving! The time keeps going no matter what, so the distance, whether it is 0 m or 10,000 km, if the y is horizontal the distance does not change.