# Number Line

Pronunciation: /ˈnʌm.bər laɪn/ Explain

 Figure 1: Number line from -10 to 10 by ones.

A number line is a line with tick marks and numbers that is used to represent the set of real numbers.[2] The number line in figure 1 shows all real numbers between -10 and 10. You can use other scales with number lines. The number line in figure 2 uses a scale of 10, meaning that the distance between two adjacent tick marks represents 10 more.

 Figure 2: Number line from -100 to 100 by tens.

The number line in figure 3 uses a scale of 1/10.

 Figure 3: Number line from -100 to 100 by tens.

### References

1. McAdams, David E.. All Math Words Dictionary, number line. 2nd Classroom edition 20150108-4799968. pg 127. Life is a Story Problem LLC. January 8, 2015. Buy the book
2. Bettinger, Alvin K. and Englund, John A.. Algebra and Trigonometry. pp 6-7. www.archive.org. International Textbook Company. January 1963. Last Accessed 9/5/2018. http://www.archive.org/stream/algebraandtrigon033520mbp#page/n18/mode/1up. Buy the book

McAdams, David E. Number Line. 4/26/2019. All Math Words Encyclopedia. Life is a Story Problem LLC. https://www.allmathwords.org/en/n/numberline.html.

### Revision History

4/26/2019: Changed equations and expressions to new format. (McAdams, David E.)
12/21/2018: Reviewed and corrected IPA pronunication. (McAdams, David E.)