Answer
The divergence is positive for the points above the $x$-axis and negative for the points below the $x$-axis.
Work Step by Step
Divergence Theorem: $\iint_S \overrightarrow{F}\cdot d\overrightarrow{S}=\iiint_Ediv \overrightarrow{F}dV $
Here, $S$ shows a closed surface and $E$ is the region inside that surface.
$div F=\dfrac{\partial p}{\partial x}+\dfrac{\partial q}{\partial y}+\dfrac{\partial r}{\partial z}=y+2y=3y$
When the net flow of water is towards the point, then the divergence at that point is negative and when the net flow of water is outwards, then the divergence at that point is positive.
When there is no net flow of water inwards or outwards, the divergence at that point will be zero.
Hence, we can conclude that the divergence is positive for the points above the $x$-axis and negative for the points below the $x$-axis.