Determine if the Relation is a Function (-10,12) , (-10,-4) , (-3,-20)

$(- 10, 12)$ , $(- 10, - 4)$ , $(- 3, - 20)$

Since $x = - 10$ produces $y = 12$ and $y = - 4$ , the relation $(- 10, 12), (- 10, - 4), (- 3, - 20)$ is not a function.

The relation is not a function.