1. When the arrow is to the left, its less than just like the arrow direction of less than and when to the right it is greater than. 2. The solid is placed on the value of the x inequality. 3. When the inequality is also equal to (Thus either ≤ or ≥ ), the solid is shaded. From the image the arrow is on -2 and pointing left (less than direction) and the solid is shaded, hence less than or equal to (s) -2 .