Exercise 54 Page 162

In an $(x,y)$ ordered pair, the first number shows the $x$-coordinate and the second number shows the $y$-coordinate.

$x\text{-}$coordinate

To graph $C(5,0),$ we first find $5$ on the $x\text{-}$axis and make a mental note of this $\text{grid}$ $\text{line}.$ The $x\text{-}$coordinate $5$ tells us to move five units in the positive horizontal direction.