to the curve y = f(x) at the point P(a, f(a)) is the line through P with slope m=\lim _{x \rightarrow a} \frac{f(x)-f(a)}{x-a} provided that this limit exists. (ii) The expression of slope is m=\lim _{h \rightarrow 0} \frac{f(a+h)-f(a)}{h} (b) Find an equation of the tangent line in part (a). (c) Graph the parabola and the tangent line. As a check on your work, zoom in toward the point (-1, -4) until the parabola and the tangent line are indistinguishable.
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