In these lessons, we will learn

Related Topics: More Algebra Lessons

### The Concept Of Inequalities

### Linear Inequality In One Variable

### Using The Number Line To Represent Inequalities

### Videos

Inequalities on a number line.

How to Graph an Inequality on a Number Line.
Introduction to Linear Inequalities.
This inequalities calculator will graph inequalities on the number line.

You can use the free Mathway widget below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

- the concept of inequalities and the symbols used.
- linear inequalities in one variable
- how to graph inequalities on the number line.

Related Topics: More Algebra Lessons

An inequality is a relationship between two quantities that are not equal.

The symbols used for inequality are:

> means ‘greater than’

< means ‘less than’

≥ means ‘greater than or equal to’

≤ means ‘less than or equal to’

In equations, one side is equal to the other side. In linear inequalities, one side is bigger than or smaller than or equal to the other side.

A linear equation in one variable has only one solution. An inequality in one variable has a set of possible solutions.

*Example: *

Given that *x* is an integer. State the possible integer values of *x* in the following inequalities.

a) *x* > 4

b) *x* ≤ –3

* Solution: *

a) *x* is greater than 4.

5, 6, 7, 8, …

b) *x* is less than or equal to –3

We can represent a linear inequality in one variable on a number line. We use the following symbols in the representation.

A small circle is used for < and > to indicate that the number is not included.

A filled-in circle is used for ≤ and ≥ to indicate that the number is included.

A line with an arrow indicates that the line continues to infinity in the direction of the arrow.

*Example: *

Represent each inequality on a number line.

a) *x* ≤ 0

b) *x* > 2

c) *x* < 1

d) *x* ≥1

* Solution: *

Graphing Inequalities on a Number Line.

How to Graph an Inequality on a Number Line.

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You can use the free Mathway widget below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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