Pre-Algebra Examples

${(- 5, 4), (4, - 5), (5, - 5), (5, 4)}$

Step 1

Since $x = 5$ produces $y = - 5$ and $y = 4$ , the relation $(- 5, 4), (4, - 5), (5, - 5), (5, 4)$ is not a function.

The relation is not a function.