We want to describe the relationship between these two points with rational coordinates.

(9, - \frac{2}{5}) and (9, \frac{2}{5})

Looking at the coordinates, we can see that the

y -

coordinates of the points are opposite numbers. We know this because they are the same value with opposite signs.

(9, - \frac{2}{5}) and (9, \frac{2}{5})

Also, the

x -

coordinates of the points are the same.

(9, - \frac{2}{5}) and (9, \frac{2}{5})

Let's now take a look at the location of the points. We are going to plot each point on a coordinate plane. Here are the steps to follow when we plot a coordinate pair

(x, y)

on a coordinate plane.

First, we find $x$ on the $x -$ axis.
We move up or down $y$ units from $x$ on the $x -$ axis. The direction depends on the sign of $y .$
We draw a point at the location.