In a position-time graph, what does the slope of the line represent?

• Correct Answer: velocity
• direction
• position
• time

Explanation: In a position-time graph, the velocity of the moving object is represented by the slope, or steepness, of the graph line. If the graph line is horizontal, like the line after time = 5 seconds in Graph 2 in the Figure below , then the slope is zero and so is the velocity. The position of the object is not changing. The steeper the line is, the greater the slope of the line is and the faster the object’s motion is changing.

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