Question 917546
y = x/2 + 1
y - 1 = x/2
2y - 2 = x


f^(-1)(x) = 2x - 2


Notice that f(x) and f^(-1)(x) are symmetric about the line y = x.
{{{graph(500, 400, -10, 10, -10, 10, x/2 + 1, 2x - 2)}}}