Algebra Examples

$R = {(4, 1), (3, - 4), (2, - 2), (4, - 1)}$

Step 1

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

The relation is not a function.