Mathematics for IGCSE & O level - Graphs In Practical Situations (Section 6 - No. 20)
What does the slope of the tangent line represent in a speed-time graph that is a curve?
The speed at that instant
The gradient of the tangent at that instant
The instantaneous rate of change of speed
The total distance travelled
Explanation
The tangent line gives the instantaneous rate of change (acceleration) and the speed at that specific point in time.
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