If f(x) = 312 - 52 + 6, find f'( - 4). -29 Use this to find the equation of the tangent line to the parabola y = 312 - 51 + 6 at the point ( - 4, 74). The equation of this tangent line can be written in the form y = ma + b where m is: and where b is: Question Help: [Video Message instructor Submit