Examples

(1, 2)

$(1, 2)$ ,

$(3, 4)$

Step 1

Since there is one value of

$y$ for every value of

$x$ in

$(1, 2), (3, 4)$ , this relation is a function.

The relation is a function.

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