Mathematics for IGCSE & O level - Graphs In Practical Situations (Section 6 - No. 30)
What is the physical meaning of a negative slope in a distance-time graph?
The object is slowing down.
The object is at rest.
The object is moving in the opposite direction.
The object's speed is increasing.
Explication
A negative slope indicates the object is moving towards its starting point, i.e., in the opposite direction or going backward.