7th Grade · Expressions & Equations
Open Circle
7.EE.B.4b
Definition
Placed at the boundary value of an inequality that uses < or >. The boundary point is NOT included in the solution set.
Examples
- x > 4 — 4 is the boundary but solutions start just above it.
- x < -1 — -1 is NOT included.
Key rule
Does the inequality have an equals bar? No means open circle.
Memory hook
Open circle = the boundary doesn't count.