The graphs of ff and f1f^{-1} are symmetrical about the line y=x.y=x.

Examples

x{x}
y{y}
(0,0){\left(0 , 0 \right)}
y=f(x){y=f(x)}
y=f1(x){y=f^{-1}(x)}
y=x{y=x}
f:x5xfor xR,x>0.{f: x \mapsto 5 x} \allowbreak \quad \allowbreak {\textrm{for } x \in \mathbb{R}, x > 0.}
f1:x15xfor xR,x>0.{f^{-1}: x \mapsto \frac{1}{5} x} \allowbreak \quad \allowbreak {\textrm{for } x \in \mathbb{R}, x > 0.}
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