Answer:
![\large\boxed{x\leq0}](https://img.qammunity.org/2020/formulas/mathematics/middle-school/dk8fl7812n3ly7swg4pfmvuraei3p3amoh.png)
Explanation:
x ≤ 0 - the region below the line x = 0 (x axis)
x ≥ 0 - the region above the line x = 0 (x axis)
y ≤ 0 - the region on the left of the line y = 0 (y axis)
y ≥ 0 - the region on the right side of the line y = 0 (y axis)
all region with lines (axes)
We have the region below the x axis (x = 0).