Determining if a Relation is a Function

To find the $x$-coordinate of a point, we move vertically until we hit the $x$-axis. Similarly, to find the $y$-coordinate, we move horizontally until we hit the $y$-axis. Let's determine the $x$- and $y$-values of the point in the first quadrant.

We see that this point has coordinates $(2,3).$ We'll follow the same process for the other points, moving vertically until hitting the $x$-axis and moving horizontally until hitting the $y$-axis.

Now, let's list the points above as ordered pairs. $$\begin{array}{c}(\text{-}3,\text{-}2),(\text{-}2,2),(2,3),(3,\text{-}1)\end{array}$$