at (2, 7). Exercise 4.4.6 Find an equation for the tangent line to Exercise 4.4.8 Let y = f (x) and x = g(t). Ifg(l) = 2, f (2) = 3, g'(l ) = 4 and f' (2) = 5, find the derivative of fog at 1. Exercise 4.4.9 Use the graphical information of the functions f and g to find the derivative of the compo- sitionfunction and the given x-value.