Question about Texas Instruments TI-84 Plus Calculator

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My calculator will not graph

When i go to graph something on my calculator it will not graph. i enter the information right and press "graph" and then the screen says "err: invalid dim" please help me!

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Clear the old contents of variables .
Press [2nd][MEM][2:Mem Mngt/Del][6:Y-Vars][ENTER]. The graph functions that have been defined are listed on screen. Scroll to select the one you want to use and press [DEL].
There is amore radical way to clear the memory:
Press [2nd][MEM][7:Reset] [1:All RAM][2:Reset][ENTER].
Hope it helps.

Posted on Oct 02, 2009


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1 Answer

How do I set up graph lines

in order to give the calculator a function to graph, you will want to enter the y= window by pressing the top left most button on the calculator. nintenman1.gif a menu similar to the one above will open, wherein you can enter an equation for the calculator to graph, such as (x^2-2). On the ti-83 itself, you can enter up to 9 equations to be graphed at once. after that, you may want to go to the window menu, where you can set the dimensions of the graphing plane in both the x row and y column. to view the graph, press the top right most button on the device.
hope that helps :)

Mar 29, 2011 | Texas Instruments TI-83 Plus Calculator

1 Answer

Hi, I wonder how to use a TI89 to graph a multivariable functions's 3D picture. Thanks.


First you must configure your calculator to perform 3D graphics
Press MODE
1.The first line shown is Graph. Unfold the hidden menu list with the right arrow and choose Graph 5:3D
2. Press ENTER to validate.

Now you must define the surface you want to draw
1. Press the [diamond] key then [Y=] to get a list of function names, the first of which is z1
2. Enter the following function (or your own) z1=(x^3*y-y^3*x)/390
( x cubed times y -y cubed times x) divided by 390.
3 Press ENTER.

Graph the function
Press the [diamond] key then [GRAPH]

The graphing screen displays progress in %. When it is finished you will see a weird sombrero.

Hope it helps

Mar 21, 2011 | Texas Instruments TI-89 Calculator

1 Answer

For graphing how do I enter the information on the screen

Press the Y= button then input the function you are trying to graph. The function should look like y=2x+3 or something. It must be all x's on the other side of the =. It doesn't work if you input 2x+y+3. It must only be x's. If you are trying to graph a different kind of equation then you press the mode button and there is a horizontal list of 4 options that are (in order) FUNC (function) PAR(Parametric) POL (Polar) SEQ (Sequential). Then after you select the one you are trying to graph, you press the Y= button and fill in the information.

Mar 02, 2011 | Texas Instruments TI-83 Plus Calculator

1 Answer

How do I get it to graph something like y<2x

Press the Y= key. In the Y1= line, enter 2x+1 for the expression. Repeatedly press the left-arrow key until the cursor blinks over the down-sloping diagonal line at the very left of that line. Press ENTER three times to change the graph mode to a triangle below the diagonal. Press the GRAPH key to see the graph.

If you still have trouble, reply to this post and describe what you're getting.

Feb 06, 2011 | Texas Instruments TI-83 Plus Calculator

1 Answer

How do you graph inequalitys on the graphing calculator

Press the MENU key
Select 5:Graph and press EXE
In the Y= editor window, press F3:TYPE
Press F6 to access other graph types.
Select the inequality symbol you want and enter the right member of the inequality, then press EXE.
You are returned to the Y= screen.
When done entering your expressions to graph, press F6 Draw.

Jan 22, 2011 | Casio FX9750GII Graphic Calculator

1 Answer

Hi, I can edit my table information in my calculator but am not able to graph from it and when i go to table it shows nothing.. what do i do?

From what I understand you want to draw statistical graphs (scatter plot, box plot, etc.) If you do not see anything it may be due to the fact that the statistical plots are turned off.

Type in the data in lists L1 and L2, etc. Press [2nd][QUIT]

Press [2nd][Y=] (STAT PLOT] . Select [4:PlotsOff] [ENTER] .
Screen displays Done

Press [2nd][Y=] (STAT PLOT] . Select [1:Plot1 Off].
  1. The configuration screen for Plot1 opens with the cursor blinking ON.
  2. Press [ENTER] to turn Plot1 ON.
  3. Use Down Arrow to move cursor to second line Type:
  4. Select the type of statistical plot. Use the right arrow to move highlight on one of the 6 types.
  5. Select the type:scatter, Xline, histogram, box plot, and press [ENTER] to validate the choisce.
  6. Use down arrow to select the Xlist: use [2nd][1] to choose L1, etc. and press [ENTER]
  7. Select the Y-List (L2) and validate by pressing [ENTER]
  8. Select the data-point mark.
  9. Press [GRAPH].
If you do not see the graph or if it is not well centred, press [ZOOM][9:ZoomStat] to restrict the screen to the data entered.

Hope it helps.
Thank you for rating the solution.

Dec 09, 2009 | Texas Instruments TI-83 Plus Calculator

1 Answer

How do you find the zeros of a function on a TInspire


Turn calculator. Use arrow to highlight the 2:Graph and Geometry application. Enter your function at the bottom of the screen. Use TAB to move focus on command line.
Press [ENTER] to graph.
While graph is drawn, press [menu] key. Select [5:Trace][1:Graph Trace] . An X appears on the graph screen. Use arrow to move cursor towards one of the zeros you see. At some point the calculator will pop up the label [zero]

Press [ENTER]

Use arrows to move the cursor near a second zero. When [zero] pop up text appears, press [ENTER]


The value of the secon zero is also displayed.

You can also the nSolve command

Use the nSolve( function available in main calculator application. Here some exemples of syntax
On the second command line, the small vertical segment after the right parenthesis is accessed by the key sequence [CTRL] [infinity, beta, degree] key, the one under [left arrow/clear].


Hope it helps.

Oct 26, 2009 | Texas Instruments TI-Nspire Graphic...

3 Answers

I'm an older my 50's. I am taking classes to complete my bachelor's degree in nursing, something I should have done 30 years ago. Better late than never, right? Anyway, I found my son's TI...

Hi Anne,
here are some tips to use your TI 83 calculator. Patiently follows this:

  1. Press ENTER to find out the answer to an expression.
  2. Press 2ND before pressing a button to use the function in yellow above the button.
  3. Press ALPHA to enter in letters.
  4. Press 2ND before pressing Alpha to turn on Alpha lock, which will automatically use the alpha mode until you press a directional key or ALPHA again.
  5. Press 2ND and then hold up or down to adjust the screen contrast accordingly.
Advanced Instructions
  1. Press MODE to go to a menu that allows to change graphing modes, degree modes, and notation modes among other things.
  2. Enter in a number then press STO> then enter in a letter and hit enter to store values in variables.
  3. Press Y= and enter in a function and then press GRAPH to view it. If you are having trouble viewing it, press WINDOW and adjust the graph's window.


Aug 30, 2009 | Texas Instruments TI-83 Plus Calculator

1 Answer

My graphing calculator won't graph anything

Go to your stat plot screen, and select option 4 (PlotsOff), Press Enter, and try to plot a normal graph again

Jul 07, 2009 | Texas Instruments TI-84 Plus Calculator

3 Answers

My calculator will only graph one graph at a time.

This is simple... Back up all RAM, (press second+, then 2, then 1, press enter to back up something if backed up it will have a star by it) Then clear your RAM (pull out your batteries while the calc is still on or press second+, then 7, then 1)
Hope this helps!

Oct 07, 2008 | Texas Instruments TI-84 Plus Calculator

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