How do I find which "part" of a graph represents an inequality?

Rearrange the equation so "y" is on the left and everything else on the right.

Plot the "y=" line (make it a solid line for y≤ or y≥, and a dashed line for y)

Shade above the line for a "greater than" (y> or y≥) or below the line for a "less than" (y< or y≤).