Hofstra University
Hofstra University: Function Grapher
This site contains an actual online function graphing utility. Allows you to type in a function, choose max and min x and y values, zoom in and out, as well as a variety of other features. Just like having a graphing calculator online.
Savvas Learning
Prentice Hall Science & Math: Graphing Calculator Help
This site provides very complete help guides for a variety of graphing calculator models, complete with pictures and step-by-step instructions.
Texas Instruments
Texas Instruments: Graphing Calculators
Contains information on different kinds of Texas Instruments graphing calculators.
Wyzant
Wyzant: Calculator Index
These WyzAnt online graphing utilities help you calculate just about anything in algebra, including solving linear and quadratic equations to factoring polynomials. This a great tool for checking homework.
Discovery Education
Discovery Education: Web Math: Graph a Circle
WebMath offers a java applet that allows you to input information about a circle, in one of four forms, and gives you the graph of the circle.
Discovery Education
Discovery Education: Web Math: Graphing Ellipses
WebMath offers a java applet that allows you to input information about an ellipse, in one of four forms, and gives you the graph of the ellipse.
Richland Community College
Richmond Community College: Graphing Utilities
This site from the Richmond Community College is a great site to learn about graphs and graphing utilities. The information is not too indepth, but it is very informative, and a good over-all site.
Iowa State University
Iowa State Univ: Plotting Scatter Plot in X Gobi
Site explains how the XGobi computer program can be used to plot data in a scatter plot.