Relations and Functions

Relations and Functions are mathematical tools usually used to help bring everyday scenarios into mathematics. This unit is the basics of relations and functions, and is very important for higher level mathematics. Purplemath.com again has great help files for this unit. Just click a link for a topic below and when you want to come back here, close the new window that opens.

Relations vs. Functions Introduction: http://www.purplemath.com/modules/fcns.htm

Domain and Range: http://www.purplemath.com/modules/fcns2.htm

Function Notation and Evaluation: http://www.purplemath.com/modules/fcnnot.htm (Ignore the section on Piecewise Functions at the bottom.)

Graphing a Linear Function using Table of Values: http://www.purplemath.com/modules/graphlin.htm

Graphing a Linear Function with Slope-Intercept Method: http://www.purplemath.com/modules/slopgrph.htm

Finding the Equation of a Line from Information Given: http://www.purplemath.com/modules/strtlneq.htm

Parallel and Perpendicular Lines: http://www.purplemath.com/modules/strtlneq3.htm

Solving Systems of Linear Equations by Graphing: http://www.purplemath.com/modules/systlin2.htm

Solving Systems of Linear Equations by Addition/Subtraction: http://www.purplemath.com/modules/systlin4.htm

Solving Systems of Linear Equations by Substitution: http://www.purplemath.com/modules/systlin3.htm

Remember, you should only be using these pages on the advice of your teacher. Your teacher is the first and best resource for help.