Precalculus Examples

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

Step 1

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

The relation is not a function.

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$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$