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2. Tap [Analysis], [Trace], or tap =.
• This will display the pointer at the coordinates where = 0. The pointer will not be visible when it is located
at a point outside the graph display area.
• If "Undefined" appears in place of the
Press the left or right cursor key to move to a point that is defined.
3. Press the left or right cursor key, or tap the left or right graph controller arrow.
• This moves the pointer along the graph, and displays the coordinates of
the current pointer location.
• You can also move the pointer to a particular point by inputting
coordinates. Pressing a number key displays a dialog box for inputting
coordinates. Input the values you want and then tap [OK].
• When there are multiple graphs on the Graph window, you can use the up
and down cursor keys or the up and down graph controller arrows to move the pointer between graphs.
4. To quit the trace operation, tap l on the icon panel.
Tip
• While the trace pointer is on the window, tapping the displayed coordinate values causes the coordinate values to appear
in the message box. You can then copy the coordinates to the clipboard.
• Selecting the [Derivative/Slope] check box on the Graph Format Dialog Box will show the derivative along with
coordinates while the trace pointer is on the display. Clearing the [Coordinates] check box will hide the coordinate display
while the trace pointer is on the display. For more information, see "Graph Format Dialog Box" on page 36.
3-5 Using the Sketch Menu
The [Sketch] menu lets you add points, lines, figures, and text after you draw a graph. You can also add
tangent and normal lines to your graph.
Using Sketch Menu Commands
This section describes how to use each of the commands on the [Sketch] menu.
u To clear figures inserted using the Sketch menu
To clear plots, lines, text, or other figures inserted using the [Sketch] menu, tap [Analysis], [Sketch], and then
[Cls]. This redraws the graph to what is stored on the Graph Editor window.
u To plot a point on the Graph window
1. While the Graph window is active, tap [Analysis], [Sketch], and then [Plot].
2. Tap the location on the Graph window where you want to plot a point.
• Instead of tapping the Graph window, you could also use the keypad to specify the coordinates of the point.
Press a number key on the keypad. On the dialog box that appears, input - and -coordinate values, and
then tap [OK].
u To draw a line on the Graph window
1. While the Graph window is active, tap [Analysis], [Sketch], and then [Line].
2. Tap the start point of the line and then tap the end point. This causes a straight line to be drawn between the
two points. The message box shows the equation of the line.
• Instead of tapping the Graph window, you can use the keypad to specify the coordinates of the start point
and end point. Press a number key on the keypad. On the dialog box that appears, input the coordinates
for the start point (
or
,
) and the end point (
1
1
coordinate, it means that the current point is undefined.
,
), and then tap [OK].
2
2
Chapter 3: Graph & Table Application
110
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