Graphing Inequalities on a number line

It is a closed circle on the number line when the problem is using the greater than or equal to sign, or less than or equal to sign: ≤ or ≥

It is and open circle on the number line when the problem is using the greater than or less than symbols: < or >

The arrow points whichever way the symbol is pointing. If the symbol points left, the line will follow the left of the number line. If the symbol is pointing right, the line will follow the right of the number line.