## Precalculus (6th Edition)

$\left\{(-1, 3), (0, 5), (5, 0), (\frac{2}{3}, 4)\right\}$
Every first coordinate of the function is paired with only one second coordinate. Every second coordinate of the function is paired with only one first coordinate. Thus, the given function is one-to-one. The inverse function can be found by interchanging the first coordinate and the second coordinate of each ordered pair: $=\left\{(-1, 3), (0, 5), (5, 0), (\frac{2}{3}, 4)\right\}$