Answer:
Speed
Step-by-step explanation:
On a distance - time graph, the slope of the line indicates the speed of the object.
Speed is the rate of change of distance with time.
Speed =
Now, the slope is the change in distance with the change time which is commensurate with the speed equation.
For a displacement - time graph, the slope is the velocity.
Therefore the slope of a distance - time graph is its speed.