Exercise 2 Page 173

To identify the $(x,y)$ ordered pair to which a given point corresponds, start at the origin and move horizontally to find the $x\text{-}$coordinate, then move vertically to find the $y\text{-}$coordinate of the point. In this case, point $D$ lies on the $x\text{-}$axis and is $2$ units to the right of the origin. So, the $x\text{-}$coordinate is $2$ and the $y\text{-}$coordinate is $0.$

Therefore, point $D$ lies at the coordinate pair $(2,0).$