Consider the parabola y = 8x-x. (a) Find the slope of the tangent line to the parabola at the point (1, 7). (b) Find an equation of the tangent line in part (a). y= (c) Graph the parabola and the tangent line. y 201 -20 10 -10 10 20 -20 -10 -201 y 20- 10 -10 -201 10 20 -20 -10 y 20- 10 -10 -20F x 10 20 -20 -10 y 20- 10 -10 -201