On a distance-time graph, the slope of the line indicates the of the object

Speed

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.

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