If f superscript negative 1f−1 denotes the inverse of a function f, then the graphs of f and f superscript negative 1f−1 are symmetric with respect to the line

The symmetric with respect to the line y is equal to x. The answer in this question is y equal x. If f superscript negative 1f−1 denotes the inverse of a function f, then the graphs of f and f superscript negative 1f−1 are symmetric with respect to the line y equal x.