Question

which inequality symbol has a closed circle?

Explanation:

In graphing inequalities on a number - line, a closed circle is used when the number is included in the solution set. The symbols $\leq$ (less than or equal to) and $\geq$ (greater than or equal to) include the boundary value, so they are graphed with a closed circle. The symbol $<$ (less than) does not include the boundary value and is graphed with an open circle.

Answer:

$\leq$