Inverse Functions (Grade 12 NSC Matric Mathematics): Quizzes

Reverses or undoes the operation

It must be a one-to-one relation

Interchange $x$ and $y$

$\frac{x + 5}{3}$

Reflections about the line $y = x$

The inverse function

$\frac{x}{5}$

Check that $f(f^{-1}(x)) = x$

Inverse gives two outputs per input

$x$- and $y$-coordinates are equal