Question

the picture of the position vs. time graph shows an object that is... not moving accelerating/speeding up moving at a constant speed accelerating/slowing down.

Explanation:

Step1: Recall position - time graph slope meaning

The slope of a position - time graph represents velocity.

Step2: Analyze the given graph

The position - time graph is a straight line with a constant negative slope.

Step3: Determine the motion

A constant slope means a constant velocity. Since the slope is non - zero and constant, the object is moving at a constant speed.

Answer:

moving at a constant speed