Algebra Examples

$(1, 2)$ , $(2, 3)$ , $(3, 4)$ , $(2, 5)$

Step 1

Since $x = 2$ produces $y = 3$ and $y = 5$ , the relation $(1, 2), (2, 3), (3, 4), (2, 5)$ is not a function.

The relation is not a function.