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

Examples

x{x}
y{y}
(8,7){\left(-8 , -7 \right)}
(2,3){\left(2 , 3 \right)}
(7,8){\left(-7 , -8 \right)}
(3,2){\left(3 , 2 \right)}
y=f(x){y=f(x)}
y=f1(x){y=f^{-1}(x)}
y=x{y=x}
f:xx+1for xR,8x<2.{f: x \mapsto x + 1} \allowbreak \quad \allowbreak {\textrm{for } x \in \mathbb{R}, -8 \leq x < 2.}
f1:xx1for xR,7x<3.{f^{-1}: x \mapsto x - 1} \allowbreak \quad \allowbreak {\textrm{for } x \in \mathbb{R}, -7\leq x<3 .}
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