What is the formula for the slope of a secant line?

1 Answer
AJ Speller
Sep 28, 2014

The formula for the slope of the secant line can be found using this different forms of the same definition.

(Deltay)/(Deltax)=(y_2-y_1)/(x_2-x_1)=(f(x+Deltax)-f(x))/(Deltax)=(f(b)-f(a))/(b-a)

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