Burger, Edward B., David J. Chard, Paul A. Kennedy, Steve Leinwand, Freddie Lee. Renfro, Tom W. Roby, and Bert K. Waits. Holt McDougal Larson Algebra 1. Orlando, FL: Holt McDougal/Houghton Mifflin Harcourt, 2012. Print.
"Definition of Parameter." Definition of Parameter. MathisFun, 2014. Web. 4 Oct. 2015. <https://www.mathsisfun.com/definitions/parameter.html>.
Reyes. "Semester Review Packet." Semester Review Packet (n.d.): n. pag. Semester Review Packet. University of Arizona Department of Mathematics. Web. 4 Oct. 2015.
"Definition of Parameter." Definition of Parameter. MathisFun, 2014. Web. 4 Oct. 2015. <https://www.mathsisfun.com/definitions/parameter.html>.
Reyes. "Semester Review Packet." Semester Review Packet (n.d.): n. pag. Semester Review Packet. University of Arizona Department of Mathematics. Web. 4 Oct. 2015.