Pre-Algebra Examples

$(4, 2)$ , $(4, 3)$ , $(4, 7)$ , $(4, 9)$

Step 1

Since $x = 4$ produces $y = 7$ and $y = 9$ , the relation $(4, 2), (4, 3), (4, 7), (4, 9)$ is not a function.

The relation is not a function.