Texas Instruments TI-92 Getting Started page 9

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Graphing Technology Guide: TI-92
the number of the application you want in that window. The Split 2 App determines what is shown in the bottom or
right-hand window. Press ENTER to confirm your choices and your TI-92's screen will now be divided either
horizontally or vertically (as you choose). Figure 5.15 shows the graph and the Y= screen with the settings shown in
Figure 5.16. The split screen is also useful when you need to do some calculations as you trace along a graph. In
split screen mode, one side of the screen will be more heavily outlined. This is the active screen, i.e., the screen that
you can currently modify. You can change which side is active by using 2nd to access the symbol above the APPS
key. For now, restore the TI-92 to Full screen.
Technology Tip: Note that if you set one part of your screen to contain a table and the other to contain a graph, the
table will not necessarily correspond to the graph unless you use TblSet to generate a new table based on the
functions(s) being graphed(as in Section 5.2.1).
Figure 5.15: Split screen: LEFT-RIGHT Figure 5.16: MODE settings for Figure 5.15
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Your graph window may look like the one in Figure 5.17 or it may be different. Since the graph of y = –x + 4x
extends infinitely far left and right and also infinitely far up and down, the TI-92 can display only a piece of the
actual graph. This displayed rectangular part is called a viewing rectangle. You can easily change the viewing
rectangle to enhance your investigation of a graph.
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Figure 5.17: Graph of y = –x + 4x
The viewing rectangle in Figure 5.17 shows the part of the graph that extends horizontally from –10 to 10 and
vertically from –10 to 10. Press WINDOW to see information about your viewing rectangle. Figure 5.18 shows
the WINDOW screen that corresponds to the viewing rectangle in Figure 5.17. This is the standard viewing
rectangle for the TI-92.
The variables xmin and xmax are the minimum and maximum x-values of the viewing rectangle; ymin and ymax
are the minimum and maximum y-values.
xscl and yscl set the spacing between tick marks on the axes.
xres sets pixel resolution (1 through 10) for function graphs.
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