How to find the slope of a secant line?
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Secant Lines Consider the function and the point on the graph of f.
(a) Grapf f and the secant lines passing through and for x-value of , and
(b) Find the slope of each secant line.
(c) Use the result of part (b) to estimate the slope of the tangent line to the graph of f at . Describe how to improve your approximation of the slope.