18 Using the Scratchpad
If the entry line is not shown, press Ctrl + G or press b 2 3 to display the
entry line and type an expression to graph.
2. Press b > Graph Entry/Edit and select a graph type.
For example:
• To graph an equation for a circle, press b > Graph Entry/Edit > Equation >
Circle > (x-h)
2
+ (y-k)
2
= r
2
or press b 3 2 3 1. Fill in the equation and
press · to draw the circle.
• To graph a function, press b > Graph Entry/Edit > Function or press
b 3 1.
The entry line changes to display the expression format for the specified graph
type. You can specify multiple relations of each graph type.
3. Type an expression and any other parameters required for the graph type.
4. Press · to graph the relation, or press ¤ to add another relation. If necessary,
you can use press b 4 to choose a tool on the Window/Zoom menu and adjust
the viewing area.
When you graph the relation, the entry line disappears to show an uncluttered
view of the graph. If you select or trace a plot, the relation that defines the plot is
displayed on the entry line. You can modify a plot by defining a relation or by
selecting and changing the graph.
As you graph multiple plots, the defining relation is displayed for each. You can
define and graph a maximum of 99 relations of each type.
5. Use the b key to explore and analyze the relation to:
• Trace the relation.
• Find points of interest.
• Assign a variable in the expression to a slider.
Viewing the Table
▶ To display a table of values corresponding to the current plots, press b > Table >
Split-screen Table (b 7 1).
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