(a) Find the slope of the tangent line to the parabola y = x2 + 7x at the point (-2, -10) by using the following parameters. f(x) – f(a) (i) The tangent line to the curve y = f(x) at the point P(a, f(a)) is the line through P with slope m = lim provided that this limit exists. Xa X - a m = f(a + h) – f(a) (ii) The expression of slope is m = lim h-0 h m = (b) Find an equation of the tangent line in part (a). y =

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