Texas Instruments TI-92 Getting Started page 10

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Graphing Technology Guide: TI-92
Figure 5.18: Standard WINDOW
Technology Tip: Small xres values improve graph resolution, but may cause the TI-92 to draw graphs more slowly.
to move up and down from one line to another in this list; pressing the ENTER key will move down
Use and
the list. Enter a new value to over-write a previous value and then press ENTER. Remember that a minimum must
be less than the corresponding maximum or the TI-92 will issue an error message. Also, remember to use the (-) key,
not – (which is subtraction), when you want to enter a negative value. Figures 5.17–18, 5.19–20, and 5.21–22 show
different WINDOW screens and the corresponding viewing rectangle for each one.
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Figure 5.19: Square window Figure 5.20: Graph of y = –x + 4x
To initialize the viewing rectangle quickly to the standard viewing rectangle (Figure 5.18), press F2[Zoom]
6[ZoomStd]. To set the viewing rectangle quickly to a square (Figure 5.19), press F2[Zoom] 5[ZoomSqr]. More
information about square windows is presented later in Section 5.2.4.
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Figure 5.21: Custom window Figure 5.22: Graph of y = –x + 4x
Sometimes you may wish to display grid points corresponding to tick marks on the axes. This and other graph
format options may be changed while you are viewing the graph by pressing F1 to get the TooIBar menu (Figure
5.23) and then pressing 9[Format] to display the Format menu (Figure 5.24) or by pressing F as indicated on the
ToolBar menu in Figure 5.23. Use the cursor pad to move the blinking cursor to Grid; press 2[On] ENTER to
redraw the graph. Figure 5.25 shows the same graph as in Figure 5.22 but with the grid turned on.
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