Question about Texas Instruments TI-89 Calculator

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Ti-89 help hi, can you tell me how you create a new program, and after you put in all the data, how do you graph it.

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You create a program by using the program editor. Press the "APPS" key and select "Program Editor".

What type of data graph do you want? The TI-89 can plot Scatter, XYline, Box, and Histgram graphs. Use the "Plot Setup" screen to select the desired plot type.

Posted on Jan 17, 2010


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How can i store formula in ti-90 titanium?

There are a number of ways you can store a formula.
The first is to store is in y Vars. Just input your single variable equation into the graphing screen, then trace to find the value.
If you want to store something more complicated than that, or just store some plain text, creating a non functional program is then next best way.
To create the program: Hit the apps key and then scroll down to 7:Program Editor then hit enter Create a new program (name it whatever you want).
Type in your text and when you are done hit 2nd then quit
It should display the text your previously typed in.
To display the program: Hit the apps key and then scroll down to 7:Program Editor then hit enter Thenscroll to 2: open, hit enter. Select your program then press enter.

Feb 24, 2011 | Texas Instruments TI-89 Calculator

2 Answers

How do I clear things left in the stat plot window?

To clean the slate so to speak, just reset the RAM.
  1. Press [2nd][+] to access the (MEM)ory management function
  2. Press [7:Reset]
  3. Press [1:All Ram]
  4. Press [2:Reset]
  5. Press [CLEAR] to erase the "RAM cleared" Message


Aug 02, 2010 | Texas Instruments TI-83 Plus Calculator

2 Answers

I am trying to drive a prediction equation. but the book gives directions to aTI-84 and I have a TI-89. I have these steps "STAT, EDIT, L1, L2,STAT, CALC,LinReg(ax+b), ENTER" I have no clue how to make...

I assume you know how to enter data in your calculator. The keystrokes in the following pertain to TI92/92Plus/ Voyage 200 PLT. The main differences with the TI89/Ti89 Titanium is that the function keys F6,F7,F8 are not accessed directly but by the key sequences [2nd][F1], [2nd][F2], and [2nd][F3] respectively

1. CLEAN THE SLATE (so to speak) and ENTER DATA

In Home folder run F6: NewProb to reset the configuration.
Press Apps, and select 6: data/Matrix editor. Select a new data set

Give it a name: here testing.


Press OK/ENTER, The data entry screen opens, enter your values.

When you finish press F2.PlotSetUp.

2. Statistical plot setup and scatter plot drawing


Press F1:define to configure Plot1. Choose Scatter, then choose a mark for the data point. I select 5:Dot. and press [ENTER

Select the data column X=c1, Y=c2


Press ENTER to save configuration. Press [CTRL] [GRAPH] On my TI92 the CTRL key is the [Diamond] key. On the following graph I changed the mark to a cross to see the data point better. I also played with the window dimension. You can also do that with ZoomStat. The graph remind me of a parabola (I know I chose the exact values)



Now we have to find the equation that fits these data best.
You press APPS 6:Data/ Matrix editor but you select current to return to your data set. You are taken to the data entry editor (Figure 3 above). In that screen Press F5:Calc to edit the type of statistics you want

On first line select the type of regression model : Linear Regression, QuadReg quadratic regression (or anything else available) X is from column1, Y is from column 2. Store RegEQ The regression equation in say Y1(x)


Press ENTER to save to get the Regression Equation. Here it is
As you can see I cheated: a perfect parabola. R^2 =1.


And here the best fit represented on same graph as the statistical data


Usually you have to try different regression models, until you find the one that fits best the experimental data.

Jul 26, 2010 | Texas Instruments TI-89 Calculator

1 Answer

Whenever i try to link my calculator with other ones it always says error in xmit. no matter what i do

Read the following answer from the TI Knowledge Base.
Hope it helps.

How can I troubleshoot an Error in Xmit error message when transferring data between two graphing calculators?

The Error in Xmit error message is returned when a connection cannot be established between two calculators when attempting to transfer data. There are several factors that can contribute to this error message.
• The calculators being connected are not compatible for data transfer.
• The data cable is not firmly connected to both units.
• The receiving calculator is not in receive mode.
• The I/O port on one of the graphing calculators is damaged.
The procedure for connecting two graphing calculators is as follows:

• Connect the data cable to the I/O port of each unit. The cable will fit tightly in the I/O port and snap into place. If silver from the cable is visible, the cable is not properly connected.
• Access the Link menu on each unit
• Place the receiving graphing calculator on "Receive"
• Place the sending unit on "Transmit" or "Send" from the Link menu.

Once the data has been selected, the transfer will commence accordingly.

The data transfer protocols for graphing calculator is as follows:

• TI-73 - Link allows data sharing with another TI-73, TI-82, TI-83, and TI-83 Plus.
• TI-82 - Link allows data sharing with another TI-82.
• TI-83 - Link allows data sharing with the TI-82, TI-83 family calculator, and TI-84 Plus family calculator.
• TI-83 Plus/TI-84 Plus family- Link allows data sharing with another TI-82, TI-83 family calculator, and TI-84 Plus family calculator.
• TI-85 - Link allows data sharing with another TI-85(To a TI-86. Not From a TI-86).
• TI-86 - Link allows data sharing with another TI-86 and from a TI-85 to a TI-86.
• TI-89 family- Link allows data sharing with another TI-89 family calculator and from a TI-92 family calculator.
• TI-92 family- Link allows data sharing with another TI-92 family calculator and from a TI-89 family calculator.
• Voyage™ 200 - Link allows data sharing with another Voyage 200 and TI-92 family calculator.

If the cable does not fit properly into the I/O port, or if the I/O port appears to be damaged (broken or separated plastic, obstruction inside the port), call 1-800-TI-CARES (1-800-842-2737) M-TH 8:00 AM - 7:00 PM FRI 10:00 AM - 7:00 PM Central Standard Time to speak to a representative or sending an email to

Oct 22, 2009 | Texas Instruments TI-83 Plus Calculator

2 Answers

How do you plot two liner equations on a ti-84?

I use one of the graphing APPS or do through a program. I have a users manual for TI 84 silver Edition that shows you how to archive\ unarchive to run programs here at this site. Usually, I tell people to just forget about the programs and use the simple concepts so, that they could operate their calculator better. But, if you notice in those program are actually more powerful than the programs you get on the web, because I wrote them to be flawless, or I only used programs that I knew would not clash and were very well written. Won't y1=(2/5)x-(11/5) and -3x+8 work?

y1=(2/5)x-(11/5) and -3x+8

Sep 29, 2009 | Texas Instruments TI-89 Calculator

1 Answer

Cannot connect ti 89 to computer. I have installed the correct software from the ti 89 website for my computer and my calculator when I satart ti 89 connect it tells me there is an error.

Check to make sure TI-Connect is looking on the right port, whether USB or serial. If you have a serial cable, you might consider using Ti's Graph-Link software to connect. I have had trouble getting it to work right with TI-Connect. You can find Graph-Link on TI's Education site under Downloads > Connectivity Software. I personally prefer the free program TiLP, which runs on Windows, Mac, and Linux and supports whatever cable you want. Hope this helps!

Sep 29, 2009 | Texas Instruments TI-89 Calculator

1 Answer

New, barely used 89 drains batteries quickly

Because the games programs are writen badly and are running even when the calculator is off. Battery life will be extended if you get rid of the games.

Apr 14, 2009 | Texas Instruments TI-83 Plus Silver...

2 Answers

Deleting the 3D function

I heard of instructor disabiling APPS but, not functions. One reason I can't see that is I can download a program that does the same thing and hide it w/ instructor even knowing its there unless he ran a search in ever folder or open a lot of programs

Mar 24, 2009 | Texas Instruments TI-89 Calculator

2 Answers

I am trying to graph r=sqroot(sin2theta) on my ti-89 titanium in polar mode and it is telling me when i try to graph that there is an undefined variable. what do i do?

Did you still need help with this? My suspicion is a missing multiplication sign. Sometimes you need to be very explicit in what you want the calculator to do. Have you tried sqroot(sin(2*theta)) explicitly putting the multiplication symbol in there? I think 2theta is interpreted as it's own variable name...

Jan 11, 2009 | Texas Instruments TI-89 Calculator

1 Answer

I accidentally resetted my ti-89 titanium

Use the TIConnect software to connect the calculator to the computer.Then in the TIconnect main window you can drag and drop the applications you downloaded from They will be transferred to the calculator.
I cannot understand why you cannot graph normally since the graphing is not an application, it is part of the OS.
While you are connected to the Internet and to the calculator, you may want to reinstall the OS directly from to your calculator
Hope it helps.

Feb 22, 2008 | Texas Instruments TI-89 Calculator

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