Inequalities on a number line - Observations

Lew W. S.
Use the drop down list to select an inequality (in one variable, x) and observe how the inequality is shown on a number line. 1. Are numbers greater or smaller as we move further along on the (a) right or (b) left, of the number line?, 2. What does the direction of the arrow indicate? 3. Do you know when to use a hollow dot or a solid dot in the diagram?