Horizontal line test (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Horizontal line test" in English language version.

refsWebsite

Global rank English rank

6^th place

6^th place

1books.google.com

3^rd place

3^rd place

archive.org (Global: 6^th place; English: 6^th place)

Stewart, James (2003). Single Variable Calculus: Early Transcendentals (5th. ed.). Toronto ON: Brook/Cole. pp. 64. ISBN 0-534-39330-6. Retrieved 15 July 2012. Therefore, we have the following geometric method for determining whether a function is one-to-one.

books.google.com (Global: 3^rd place; English: 3^rd place)

Zorn, Paul; Ostebee, Arnold (2002). Calculus from graphical, numerical, and symbolic points of view (2nd ed.). Australia: Brooks/Cole/Thomson Learning. p. 185. ISBN 0-03-025681-X. No horizontal line crosses the f-graph more than once.