Question about Texas Instruments TI-89 Calculator

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Graphing I need to know each key stroke to put the problem in to figure out how to graph.  graphing totally looses  me.  I just don't have a clue.

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Hello,

It is actually quite simple. The calculator can perform severa types of graphing, but the most common is the drawing of functions defined by a relation of the form y= fonction(x), or y=f(x) for short.

The procedure is described for the TI 89 Titanium. It is valid for the TI 89 except if I enter the color of a key.
1. Before you start, you should set up the calculator to begin a New Problem. The command for that is accessed through the menus.
Press the [HOME] key to go to main calculator folder.
In Home folder, press [2nd][F1] to access [F6][2:NewProb]. Press [ENTER] to execute the command. Screen should display Done.
2. Press yellow [Diamond] key (it is the equivalent of the CTRL key in computers) then [F1] to open the [Y=] editor.
3. Use the keypad to enter your first function on Y1= line. Press [ENTER] when finished with Y1. This will select the curve to be drawn, and a check mark appears to the left of the Y, in Y1=. If there is no check mark, the curve will not be drawn. If that happens, move cursor on Y1= and highlight it and press ENTER.
4. Enter the next function. Press [ENTER] when finished.

Try the functions Y1=3*x+0.5 and Y2=x^2 -1.

5. Press the yellow [Diamond] key to access [GRAPH]. The cartesian screen appears, the calculator starts graphing. While graphs are being drawn, the indicator BUSY is displayed at the bottom of the screen, on the right.

Here is what your screen looks like.
graphing - 776edaf.jpg
6. If BUSY indicator disappears, graphs are finished. If nothing is displayed on the screen except the axes, the functions may be out of range. In that case you can adjust the window dimensions.


You can change the values of Xmin, Xmax, Ymin, Ymax, or press [F2:Zoom] to use any of the zooming options.

This is the basic procedure to draw y=f(x) graphs.
Hope it helps.


Posted on Nov 05, 2009

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