Graphing
Functions and Curves may be graphed using the following buttons:
and 
Much like "Solve" and "Solve All" buttons, graph buttons will give you either the next single step or all the remaining steps required in order to convert an equation (or inequality) into graphable form. Once the equation is ready to be graphed, the graph window will be displayed, and the equation plotted.
A couple of points worth emphasizing about the graph window:
- Graphs may be zoomed in or out by clicking on the corresponding zoom buttons.
- A particular portion of the graph may be zoomed in by selecting the desired rectangular area within the graph window.
- Individual graphs may be removed from the graph window by clicking on their respective legend item; clicking again will make them reappear.
- Graphs are not automatically closed when you refocus the worksheet: if you click on the graph button again, a new graph window will appear. This is useful for comparison purposes. However, you need to remember to close the graph window when you no longer need it.
- "Number line" check-box determines if the graph is to be shown on a number line (checked) or in a 2-dimensional coordinate system (unchecked). Solutions to single variable equations are typically shown by default on a number line.
- Graphing will be invoked implicitly (by the system, rather than by the user), at the end of the solution process: if you press "solve step" when the solution is already shown, the graph window will open. Also, if the system can not solve a particular equation, it will try to display a graphical solution.
If you wish to graph separate points in addition to functions and curves, you should use the graphing wizard, since ordinary worksheets won't allow you to enter points. If you wish only to graph separate points, then simply supply something simple, like "x=0", for the required equation in the graphing wizard.
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