Question

when is a closed circle used?
< or ≤
< or >

or ≥

≤ or ≥
rowatch

Explanation:

In inequalities, when graphing on a number line, a closed circle is used to indicate that the number is included in the solution set. This occurs for inequalities with $\leq$ (less than or equal to) or $\geq$ (greater than or equal to) because the "equal to" part means the specific value is part of what satisfies the inequality. For example, in $x\geq3$, the number 3 is included, so we use a closed circle at 3 on the number - line.

Answer:

$\leq$ or $\geq$