Exercise 1 Page 333

To identify the $(x,y)$ ordered pair to which a given point corresponds, count horizontally from the point to the $y\text{-}$axis to find the $x\text{-}$coordinate. Similarly, count vertically from the point to the $x\text{-}$axis to find the $y\text{-}$coordinate.

In this case, we have identified that the point $A$ lies at the coordinate pair $(4,0).$