Sunday, June 3, 2012

Inequalities on Number Line

An inequality involve one of the four symbols. > , ≥ , < or ≤
The following statements illustrate the meaning of each of them.

                              x > 1 : x is greater than 1.
                              x ≥ -3 : x is greater than or equal to -3
                              x < 7 : x is less than 7
                              x ≤ -9 : x is less than or equal to -9

Inequalities can be represented on a number line , as shown in the following applet.

Note that solid mark(●) , is used to show that this value is included and hollow mark(Ο) is used to show that this value is not include. This is a Java Applet created using GeoGebra from - it looks like you don't have Java installed, please go to


  1. Thank you for providing such a nice illustrations. I would like to know how to construct these applets. Can you place provide the Step-By-Step documentation for all applets you have created?

  2. Thank you for showing interest in my blog AGNI. All these applets are created with GeoGebra. Please download it from GeoGebra requires JAVA please download its latest version from I have not created step by step documentation of my applets. I can share some of my applets with you , please share your email id.

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