If u have a open circle, then the inequality has no equal sign. But if it is a closed circle, the inequality has an equal sign. Shading to the left means " less then " . Shading to the right means " greater then " .
(1) u have an open circle on -7 with shading to the left.... x < -7
(2) u have a closed circle on 4.5 with shading to the left.... x < = 4.5 (thats less then or equal)
(3) u have an open circle on -5 with shading to the right... x > -5
(4) u have an open circle on 1.5 with shading to the right... x > 1.5
