Describing Domain and Range

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.

Now let's list the ordered pairs that we found. $$\begin{array}{c}(2,4),(8,8),(14,12)\end{array}$$ The domain of a function is found by listing the relation's $x$-values. The range is found by listing the relation's $y$-values. $$\begin{array}{rl}\text{Domain: }& \{2,8,14\}\\ \text{Range: }& \{4,8,12\}\end{array}$$