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JST17 10. Section 1a Gradient of a chord on a quadratic curve

Author:
Jill Stephenson, Integral Resources
Move the point Q closer to the point P. How does the gradient of the chord PQ change? Make Q as close to P as you can. What value do you think the gradient of the chord approaches, as Q gets close to P? Use the slider to change the position of P and repeat.

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