Final answer:
The slope of a distance vs. time graph represents the speed of the object, showing how fast the object is moving.
Step-by-step explanation:
The slope of a distance vs. time graph indicates the speed of the object. On such a graph, time is typically represented on the x-axis while distance is shown on the y-axis. The slope of the line on this type of graph is a visual representation of the object's speed, meaning how fast the object is moving. A steeper slope would indicate a higher speed, while a shallower slope indicates a lower speed. Furthermore, if the slope is constant, it shows that the object is moving at a constant speed.