We already did this problem! If we go back and look at this exercise, we evaluated the slope of the secant line from *a* = 1 to *a* + *h* for *h* = -0.1,-0.2,-0.3,-0.4, 0.4,0.3,0.2,0.1 and found that as *h* approached 0, the slope of the secant line approached 2. This means our best guess is that
*f'*(1) = 2.
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