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A-Level Biology OCR A

Point Rate Change Non Linear Find Gradient Explain Estimate

To estimate a rate on a non-linear graph, draw a tangent at the point and calculate its gradient (Δy/Δx).

To estimate the rate of change on a non-linear graph at a specific point, draw a tangent line to the curve at that point and calculate its gradient (Δy/Δx).

Front Explain how to estimate a rate of change at a particular point on a graph showing a non-linear relationship.
Back Calculating rate of change from non-linear relationship:
  • Draw a tangent to the point at which you are trying to find the gradient
  • Find ∆y/∆x of that straight line which will be the estimated gradient at the chosen point

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