Question

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

B. moving faster.

C. moving at a changing speed.

D. at rest.

Answer 1

I believe the answer is D hope it helps.

Answer 2

A horizontal line on a distance-time graph means that as time goes on, the object's distance is not changing.  That pretty much has to mean that the object is at 'rest'.