Which graphical tool is used to represent acceleration?

The correct answer is based on understanding how different types of graphs represent various aspects of motion. A velocity-time graph is specifically designed to display the relationship between velocity and time. The slope of a velocity-time graph indicates acceleration; therefore, it helps visualize how an object's velocity changes over time.

When the slope of the line on the velocity-time graph is steep, it means the acceleration is high, and when the slope is shallow, it indicates lower acceleration. If the line is horizontal, this denotes constant velocity, meaning there is no acceleration.

A position-time graph depicts the position of an object over time, primarily revealing the object's displacement but not directly indicating acceleration. An acceleration-time graph would directly provide information about acceleration values at different times, but that was not chosen. Lastly, a force-time graph relates to the forces acting on an object and is not a direct representation of acceleration. Thus, the velocity-time graph effectively conveys how acceleration affects an object's motion over time.