A Picture on a Line

Part of the Inequalities & Absolute Value section of Coddy's Algebra journey. Lesson 2 of 61.

$x > 2: a hollow dot at 2 and an arrow to the right$

This number line shows $x > 2$ . There is a dot at 2 and an arrow toward the bigger numbers. The arrow covers every answer: 3, 2.5, 1000 and every other number above 2.

The dot sits on the edge number, where the answers stop. It shows if that number is an answer too.

A hollow (empty) dot for "less than" or "greater than": 2 is not a solution of $x > 2$ .
A filled dot for "or equal to": -1 is a solution of $x \le -1$ .

$x ≤ -1: a filled dot at -1 and an arrow to the left$

Challenge

Show every solution of $x \le 3$ on the number line. The line starts with a hollow dot at 0 and the arrow pointing right. Drag the dot to the edge number. Then set the arrow and the dot. The arrow points to the side where the answers are. A filled dot means the edge number is an answer too. A hollow dot means it is not.

Try it yourself