(a) Find the slope m of the tangent to the curve y = 71 x at the point where x = a > 0. (b) Find equations of the tangent lines at the points (1,7) and (4, 7/2)
y(x) =
(at the point (1,7)
y(x) =
at the point (4, 5)

Which function has an inverse that is also a function? a.{(-4,3), (-2, 7), (-1,0), (4, -3), (11, -7)} b.{(-4, 6), (-2, 2), (-1, 6), (4,2), (11, 2)} c.{(-4,5), (-2, 9), (-1,8), (4, 8), (11,4)} d.{(-4,4), (-2, -1), (-1,0), (4, 1), (11, 1)}