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How do you go to the home screen after you have entered the y functions

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Once you finish entering a function, Pressing [2nd][Quit] will get you to the home screen. But if you want to draw the graph just press [GRAPH]

Hope it helps

Posted on Sep 04, 2009


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I deleted my home button by mistake ,could you tell me how to put it back on screen

The touch restore key on the screen, that is, asstive touch, is opened as follows:
1. Open the phone's settings and select General.
2. In GM, click on the auxiliary function;
3, enter the auxiliary function, slide up will be behind the asstive touch button can be opened.

Jun 06, 2018 | Cell Phones

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I am trying to graph function x^2+y^2+4z=10

  1. In Home, Press the MODE button.
  2. On line Graph, use right arrow to unfold the graph menu and select 3D.
  3. Press [2nd][QUIT] to go back to HOME screen.
  4. Enter the [Y=] editor.
  5. On line z1= type in the expression (10-x^2-y^2)/4
  6. Press the appropriate key sequence to [GRAPH] (on my Voyage 200PLT, I press [diamond R]
  7. While graph is displayed you can press the F2 key to access the ZOOM functions.

May 04, 2011 | Texas Instruments TI-89 Calculator

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Is there a way that I can put in a function and the input, for example the problem h(x)=ax^2+bx+c, and find the function of 0. I have a TI-84 Plus. Can I put this equation in and get it simplified somehow?

If I understand your question correctly, this is what you can do. Go to 'Y='. Put (for example) 3x^2+4x+5 in Y1. Press '2nd', 'Quit' to go back to the home screen. Press 'Vars', arrow right to 'Y-Vars', 'Enter' on 1:Function, and 'Enter' on Y1. This should put Y1 on the home screen. After Y1 type a parenthesis, the number you want to evaluate, and another parenthesis, like this: Y1(7). Press 'Enter'. You should get 180.

Feb 06, 2011 | Texas Instruments TI-84 Plus Calculator

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I can't do simple commands like expand( ), integrade, differentiate,... I know that the command is expand(X^3-1) but the answer i get is always { } with no answer in it thanks for ur help Tom

Hi tomschepers1,

I can see why the expand command doesn't work with the equation your inputting. Even though, expand(x^3-1,x) would work better. The expand command does not expand to a complex form. But, your other functions should have worked. The {} tells me your asking the calculator to do something it can't do or, is to big to do, (to many arguments).

So, you need to use the NewProb command at the Home screen. On the command line at the Home screen press, [CLEAR]. Then press, [2nd][F1][2][ENTER] and, the NewProb command will be entered at the Home screen. If that doesn't enable the functions to work properly, then you need to reset your RAM to default conditions. To reset the RAM to it's defaults press, [2nd][MEM][F1][Right Arrow][2][ENTER].

If you have any question about my solution, please post your comment and, I'll respond quickly.

Jan 14, 2011 | Texas Instruments Voyage 200 Calculator

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When I try to graph it says "ERR: INVALID DIM". How do I get rid of that, so I may graph my equations?


1. TurnOff the STATPLOTS by pressing [2nd][STAT PLOT][4:PlotsOFF]. Command echoes on the home screen. Press ENTER. Screen displays Done

2. Run the command ClrAllLists to clear the lists. Press [2nd][Catalog] Scroll down till you reach the ClrAllLists command. Highlight and press [ENTER]. Command echoes on main screen, press [ENTER] to execute it. Screen displays Done

3. Make sure you are drawing the right type of graph. To check that press [MODE], scroll down to 4th line to highlight Func and press ENTER, if you are drawing y=f(x) functions. The others are PARametric, POLar, SEQuence.

The above procedures (the first two) are likely to solve your problem. In case that does not work reset the RAM.

Press [2nd][MEM][7:Reset][1:All ram][2:Reset] [ENTER]. Screen shows RAM cleared. Clear the screen and use [Y=] to enter the functions you want to graph.
Hope it helps.

Oct 13, 2009 | Texas Instruments TI-83 Plus Calculator

1 Answer

How do I use stat plot to graph a set of points?

1.Press [MODE], scroll to set Function graphing mode.
2.Press [STAT] [5:SetUpEditor], command is pasted in home screen. Press [ENTER]. Screen displays Done. This clears old values in lists

3. Press [STAT][1:Edit] to enter data.
Press [ENTER] after each number. Cursor moves to next row. After finishing the data of Listt L1, use arrow right and UP to the head of list L2. Enter the values in list L2. Press Enter after last element.

4. Press [Y=] to display Y= editor. Clear function Y1 and all functions or remove highlight from the = in Y2, Y3, etc.
5.Press [2nd][STATPLOT]1 to select 1:Plot1

The blinking cursor on ON means graph will be drawn. Type chosen is Scatter plot. Mark chosen is a dot.

Press [ZOOM][9:ZoomStat]
If you think that the curve look like a straight line you can try to do a linear regression.
Press [STAT] Arrow right to highlight [CALC]
Select [4: LinReg(ax+b)]


LinReg(ax+b) echoes on run screen. Press [2nd] L1 Press comma, Press [2nd] L2 press comma Press [VARS] Arrow right to select [Y:VARs][1:Function] [ENTER][1:Y1]

That is the equation for the linear regression. As you see eqaution has been saved in Y1. Press [GRAPH] to get the data and the regression curve drawn on same graph.

Hope it helps.

Oct 04, 2009 | Texas Instruments TI-84 Plus Calculator

1 Answer

Hi so i have to use the cos, sin , and tan functions on my ti-89 but when i press enter it says "Error: protected memory violation"... i need to use those keys for a precalc test tomorrow and i dont know...

My guess is that you entered as variable of the the functions, the name of a variable that is reserved (system variable, app variable ). In Home screen press [F6: Clean up][ Clear a-z] [ENTER] and stick with x as function argument.
Hope it helps.

Oct 02, 2009 | Texas Instruments TI-89 Calculator

3 Answers

Graphing inverse equations

In parametric mode you are not drawing one function, but two functions X1(T) and Y1(T). If you use the DrawInv( command either on X1(T) or Y1(T) you get a syntax error.
However if you are drawing functions in Funct mode you can draw the inverse of the function that has been graphed.
Here is how you do it.

[2nd][Draw][8: DrawInv] [ENTER]
The command appears on the home screen, and you need to tell it the function it will act on. To do so press
[VARS] --> Y-Vars [1:Function]
and select the function you want, say Y1, if Y1 has already been defined.

DrawInv Y1 [ENTER]
Both Y1 and its inverse will be drawn.

Hope it helps.

Sep 02, 2009 | Texas Instruments TI-84 Plus Silver...

1 Answer

How do I reset the Cyber Home 300 to defaults?

Check your owners manual. find the function by using the on screen menu, turn this on by pressing the menu button This function is usually in the setting functions and is usually found by using the up and down arrows to find the settings function and then using the right arrow to enter the function. After entering the function you should find the factory reset function among the listed settings.use the up and down arrows to find this setting and place the cursor on it and press enter and it should reset all the functions to the factory settings for you. Hope this helps you with your problem.

Apr 19, 2009 | Cyberhome CH-DVD 300 DVD Player

1 Answer



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.
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.

Aug 27, 2008 | Texas Instruments TI-89 Calculator

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