6) Find the equation of the secant line that intersects with the curve y = x2 + 2x + 1atx= -2 and x=2 7) Compute the derivative of the given function and find the equation of the line that is tangent to its graph for the specified value Find the equation of the tangent line x =c (a) f(x) = x3 - 1, c=4 (b) f (x) = 7-2x, C = 2 (c) f ( x) = 2Vx, c = 4