Question

for this symbol, do you shade above or below the line?

Explanation:

For the inequality symbol $\leq$ (when the line is in the form $y \leq mx + b$), we shade the region where $y$ values are less than or equal to the line's $y$ values, which is below a positively sloped line (matching the top diagram's shaded area).

Answer:

Below the line (corresponding to the top diagram's shaded area, assuming the line has a positive slope in the form $y \leq mx + b$)