12.1 First Derivative and Graph
12.1 First Derivative and Graph. Example 1: Estimate the derivative graphically. To find the derivative at a certain point graphically, draw the tangent line at that point, then find the slope of the tangent line. At x = -3, f’(-3) = -3/-2 = 3/2 (down 3, left 2)- or use slope formula
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