Decreasing Function
Pronunciation: /dɪˈkris.ɪŋ ˈfʌŋk.ʃən/ Explain
 Figure 1: Decreasing function 

A decreasing function is a
function
whose values become smaller as the argument of the function increases.^{[2]}
The graph of a decreasing function descends from upper left to lower right.
Figure 1 shows the graph of the function
A function can also be decreasing on a subset of the domain of the function. This is
usually called increasing on an interval or decreasing on an interval. Figure 2
shows the graph of y =
x^{2} + 3. This function is increasing on the
interval from negative infinity to 0. This function is
also decreasing on the interval from 0 to infinity.

 Figure 2: Increasing and decreasing on an interval. 

References
 McAdams, David E.. All Math Words Dictionary, decreasing function. 2nd Classroom edition 201501084799968. pg 55. Life is a Story Problem LLC. January 8, 2015. Buy the book
 decrease. merriamwebster.com. Encyclopedia Britannica. MerriamWebster. Last Accessed 7/3/2018. http://www.merriamwebster.com/dictionary/decreasing. Buy the book
 Slaught, H. E. and Lennes N. J.. Elementary Algebra. pg 315. www.archive.org. Allyn and Bacon. 1915. Last Accessed 7/3/2018. http://www.archive.org/stream/elementaryalgebr00slaurich#page/315/mode/1up/search/decreasing. Buy the book
Cite this article as:
McAdams, David E. Decreasing Function. 4/19/2019. All Math Words Encyclopedia. Life is a Story Problem LLC. http://www.allmathwords.org/en/d/decreasingfunction.html.
Image Credits
Revision History
4/19/2019: Updated equations and expressions to the new format (
McAdams, David E.)
12/21/2018: Reviewed and corrected IPA pronunication. (
McAdams, David E.)
7/3/2018: Removed broken links, updated license, implemented new markup, implemented new Geogebra protocol. (
McAdams, David E.)
1/22/2010: Added "References". (
McAdams, David E.)
12/4/2008: Initial version. (
McAdams, David E.)