The locus of points whose distance from the x-axis is 2 must be drawn like follows
As you can observe in the image above the locus of points, in this case, are P and P'. It's important to know that the distance of 2 must be perpendicular to the x-axis.
However, we have to find all the locus all the points, which are given by the following equations
[tex]\begin{gathered} y=2 \\ y=-2 \end{gathered}[/tex]
