Function Notation
Sources
Gloag, Anne and Andrew. "Writing Linear Equations", ." December 9, 2009.http://www.ck12.org/flexr/flexbook/738
Stapel, Elizabeth. "Function Notation: Introduction / Evaluation." Purplemath. Available from http://www.purplemath.com/modules/fcnnot.htm. Accessed 03 August 2010