Consider the function and the value of a. f(x) = mtan (a) Use mtan = lim h0 2 x2 = a = 5 f(a+h)-f(a) h X to find the slope of the tangent line mtan = f'(a). (b) Find the equation of the tangent line to f at x = a. (Let x be the independent variable and y be the dependent variable.)