Mathematics for IGCSE & O level - Graphs In Practical Situations (Section 1 - No. 21)
If a speed-time graph shows a horizontal line, what does this indicate about the object's motion?
The object is accelerating.
The object is decelerating.
The object is moving at a constant speed.
The object is stationary.
Explication
A horizontal line on a speed-time graph indicates constant speed.