Operation Manual

Chapter 3: Function Graphing 73

Defining Graphs

Graphing Mode Similarities

Chapter 3 specifically describes function graphing, but the steps shown here are similar for each

graphing mode. Chapters 4, 5, and 6 describe aspects that are unique to parametric graphing, polar

graphing, and sequence graphing.

Defining a Graph

To define a graph in any graphing mode, follow these steps. Some steps are not always necessary.

1. Press z and set the appropriate graph mode.

2. Press o and enter, edit, or select one or more functions in the Y= editor.

3. Deselect stat plots, if necessary.

4. Set the graph color and line style for each function.

5. Press p and define the viewing window variables.

6. Press y . and select the graph format settings such as GridLine or Background Image.

Displaying and Exploring a Graph

After you have defined a graph, press s to display it. Explore the behavior of the function or

functions using the tools described in this chapter.

Saving a Graph for Later Use

You can store the elements that define the current graph to any of 10 graph database variables (GDB1

through

GDB9, and GDB0; Chapter 8). To recreate the current graph later, simply recall the graph

database to which you stored the original graph. Store and recall graph database variables from the

y <

STO menu.

These types of information are stored in a

GDB.

• Y= functions

• Graph style settings

• Window settings

• Format settings

You can store a picture of the current graph display to any of 10 graph picture variables (Pic1 through

Pic9, and Pic0; Chapter 8). Then you can superimpose one or more stored pictures onto the current

graph.

Note: If you have a Background Image set in the graph area, and you save a picture variable (Pic Var),

the Pic Var does not include the Background Image.

4. To trace the family of parabolas by 0.1 step size, press

4:ZDecimal. Press r and use | ~ to trace

along a graph. Use } † to switch functions.