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160
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uTo turn plot points on and off in the RUN or PRGM Mode
The following are the syntax for turning plot points on and off in these modes.
• To turn a plot point on
PlotOn <x-coordinate>, <y-coordinate>
• To turn a plot point off
PlotOff <x-coordinate>, <y-coordinate>
• To change the on/off status of a plot point
PlotChg <x-coordinate>, <y-coordinate>
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k Drawing a Line [Sketch]-[LINE]
To draw a line on a graph, first display the sketch menu and then press 6 (g)
2 (LINE) to display the line menu.
• {Line} ... {Draw a line between two plotted points}
• {F·Line} ... {Draw a line}
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uTo connect two plotted points with a line in the STAT, GRAPH,
TABLE, RECUR and CONICS Modes
[Sketch]-[LINE]-[Line]
Example To draw a line between the local maximun and local minimum
on the graph of y = x(x + 2)(x – 2)
Use the same View Window parameters as in the example on page
155.
1. After drawing a graph, display the sketch menu and then press 6 (g) 1
(PLOT) 1 (Plot) to display the pointer in the center of the screen.
2. Use the cursor keys to move the pointer to the local maximum and press w to
plot it.
3. Use the cursor keys to move the pointer to the local minimum.
10 - 2 Graphing with the Sketch Function
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