Mathematics for IGCSE & O level - Graphs In Practical Situations (Section 1 - No. 30)
What can be used to estimate the rate of change at a point on a speed-time graph if the line is not straight?
Area under the curve
The y-axis
Drawing a tangent
The x-axis
Giải thích
If the line is not straight, the rate of change can be estimated by drawing a tangent at the point.