(a) Find the slope, m, of the tangent to the curve y = 2x at the point where x = a. m (b) Find equations of the tangent lipes at the following points. (25, 10) y = y = (16,8) (c) Graph the curve and both tangents on a common screen. y y 15 X 10 20 30 40 10 -5 -10 0-15 5 10 20 20 y 15 10 30 EX 30 40 10 20 20