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Inequalities on a number line
Description
Exercise Name: Inequalities on a number line
Math Missions: 6th grade (U.S.) Math Mission, 7th grade (U.S.) Math Mission, Pre-algebra Math Mission, Mathematics I Math Mission
Types of Problems: 2

The Inequalities on a number line exercise appears under the 6th grade (U.S.) Math Mission, 7th grade (U.S.) Math Mission, Pre-algebra Math Mission and Mathematics I Math Mission. This exercise practices with inequality symbols and representing inequalities on a number line.

## Types of Problems

There are two types of problems in this exercise:

1. Select the correct graph: This problem provides an inequality and a selection of several number lines. The user is asked to select the number line that correctly displays the given inequality.
2. Write the inequality: This problem provides a number line with a set of numbers shaded. The user is asked to make a couple selections to correctly represent the given number line graph.

## Strategies

Knowledge of inequalities and their representation on number lines assist with attaining accuracy badges on this exercise. The speed badges require some patience but timing is reasonable.

1. For selecting the correct graph, it is possible to mentally see the picture before finding it among the selections which can assist faster selection.
2. Using the tab button and up and down arrows on the keyboard can assist with accomplishing the Write the inequality problem more quickly.

## Real-life Applications

1. For most people, in order to get their license they have to be at least 16. So, they can write this as an inequality. ${x}$ is the age of a person who wants to drive. In this case ${x}$ has to be greater than or equal to 16.
2. Knowledge of algebra is essential for higher math levels like trigonometry and calculus. Algebra also has countless applications in the real world.