Examples

$(1, - 2)$ , $(3, 6)$

Step 1

Since there is one value of $y$ for every value of $x$ in $(1, - 2), (3, 6)$ , this relation is a function.

The relation is a function.

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