Given y = f(x), the inverse function is written x = f−1(y), which reads “x is an inverse function of y.”

Find the inverse functions for the functions in Problem 4.27:

To find an inverse function, solve algebraically for the dependent variable in terms of the independent variable, then check to be sure it is a function. Thus 4.29.

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(a) (b) y = g(x) = x=h(y) = - - x + 15 x+15 y +36 (4.79) (4.80)