Question about Texas Instruments TI-86 Calculator

# Where is the insert variable key on my graphing calculator

Posted by Anonymous on

• Level 3:

An expert who has achieved level 3 by getting 1000 points

Superstar:

An expert that got 20 achievements.

All-Star:

An expert that got 10 achievements.

MVP:

An expert that got 5 achievements.

• Texas Instru... Master

You can type in an x-variable by pressing the x-var key.
For other graph types, the variables r, theta, t, can be enter by pressing the appropriate function key. from the graph equation entry screen.

Posted on Aug 28, 2014

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

I am not quite sure what you are asking...

(1) if asking for graphing y= -2/3x+2, then press [diamond] [F1: Y=] type in .2/3x +2, see graph by [diamond][graph]

(2) if asking for graphing y= -2/3x+a, where a=3x, then first archive a=3x in Home screen by [home], type 3x [sto] a, then go back to y= menu, and type -2/3x+a in Y1

(3) if asking for graphing an equation that is dependent on 2 variables at the same time, use x-y-z axis (aka, change mode to graphing 3-D by [mode]graph [5:3D]) then enter desired equation in y= menu using Z function in terms of x and y aka z(x,y)= ...)

Posted on Jul 23, 2008

That means one (or more) of the variables you have in your function is not defined. Check to make sure you didn't misspell any variable name. Also, check to make sure you didn't run two variable names together. "ab" is the variable ab, not a times b.

Posted on Feb 18, 2010

The Transfrm application for dynamic geometry is probably active in memory. You must purge it from RAM

1. Press APPS
2. Scroll Up or Down (Up is faster) to find Transfm.
3. Select it and press ENTER
4. Press the number corresponding to the option Uninstall.
5. Once the APP is kicked out of memory you will be able to draw multiple functions.

Posted on May 15, 2010

SOURCE: I try to graph an

If you want to graph the absolute value of a function, feed the function to the absolute value ie graph y= abs(f(x)). The calculator will take care of it. See screen captures where I draw the function y1=x^3-5x^2-3 and y2='x^3-5x^2-3'. On the first graph the function is represented and on the second the function and its absolute value.

The calculator knows how to calculate the absolute value of an expression. The name of the command is abs(

Posted on May 14, 2011

×

my-video-file.mp4

×

## Related Questions:

### When I try to graph it says argument error

Your function is not correctly defined. If graph is function y=f(x), variable must be x; if graph is polar, variable must be theta, and if graph is parametric, variable must be t. This does not cover all possible cases. Check the graph type and the definition of the function.

Mar 16, 2015 | Casio FX-9750GII Graphing Calculator

### Ti 84 plus wont graph

You might have used an inappropriate variable name.
For functional graphs y=F(x), the independent variable must be X
For parametric graphs, the independent variable in the x_t and y_t functions must be t.
For polar graphs the independent variable must be Theta, and for sequence graphs, it must be the special wiggly n.
Once you select the type of graph, the independent variable is entered by pressing the key marked X,T, Theta, n.

Dec 19, 2013 | Office Equipment & Supplies

### How do i make the lowercase t sign

The variable t is reserved for parametric graphs. If you want to use functions of the form y=, then the default variable is x. You can enter it by pressing the X,T,Theta key.
Besides, what you name a variable is purely a matter of style. Call it what you may, it will not change the shape of the graph. The full name of a variable is dummy variable, meaning that the symbol you use is irrelevant.
You do have to conform to the idiosyncrasies of your calculator, otherwise it will complain and send you error messages.

Nov 10, 2011 | Casio FX9750GII Graphic Calculator

### When i am graphing and I enter- Y1=Sin(theta) it does not graph it and says syntax error

When drawing function graphs of type Y1=, the name of the independent variable should be X
For polar graphs r=.., the independent variable is theta, while for parametric graphs it is T
To enter the default independent variable, press the key marked [X,Theta, T] . It will type in the correct name.

Sep 18, 2011 | Casio FX-9750GPlus Calculator

### The sign cos,sin and tan cannot work. Nothing appears when i press the trigo buttons. help.

When drawing function graphs of type Y1=, the name of the independent variable should be X
For polar graphs r=.., the independent variable is theta, while for parametric graphs it is T
To enter the default independent variable, press the key marked [X,Theta, T] . It will type in the correct name.

Sep 18, 2011 | Sharp EL-531VB Calculator

### How do I get the other symbols from the X, T, O, n button?

It depends on the context and the configuration of the graph type. If the graph type is function y=f(x) then pressing the button will type in the X-variable. If the graph type is polar then pressing the key will type the theta symbol. The T-symbol is enacted when graph type is parametric, and the n-variable when you are drawing sequences.
When you press the MODE button, you open a screen that configures the calculator. On the 4th line in that screen, you see FUNC, PAR, POL, SEQ.

Jul 27, 2011 | Texas Instruments TI-84 Plus Calculator

### How to insert an unknown (x) in an exponential finction in order to graph an exponential function...?? i need an answer please

To enter a variable in a function definition, you can press the [X,T, Theta, n] to the right of the [ALPHA] key.
If your function mode is y=f(X), the key will type X. If function mode is parametric, the key will type T, and if the graph mode is polar or sequence, the [X,T,Theta,n] key will type Theta, or n, respectively.

For any other symbol use the [ALPHA] entry mode.

Jan 11, 2011 | Texas Instruments TI-84 Plus Calculator

### Graphing syntax error

To draw graphs.
1. Turn calculator ON (isn't that obvious?)
2. If you see no icons, press [MENU]
3. Use arrow to move focus on GRAPH and press [EXE]
4. By default, the graph type is Y=
5. Enter your equation on line Y1=, use the [X,theta,T] key to enter the X-variable
6. Press [EXE] when finished entering a function.
7. Enter other functions if you want.
8. When done, press [F6:Draw].
9. If you do not see a big portion of the curve you can press [SHIFT] [F2:Zoom] and select [F5:Auto]
I am enclosing screen captures. The screens you see may not look exactly as on the FX-9750G, but all menu commands you have to execute are accessed by the same key sequences.

This last one is obtained with the Zoom: Auto

Mar 01, 2010 | Casio FX-9750GPlus Calculator

### I keep getting undefined variable error when i try to graph

Hello,
The default variable for the integral is x. If you have a product between two litteral symbols the * must be inserted. Arguments of functions must be enclosed between parentheses. To avoid errors clear the variables before the integration: [2nd][F6:Clean Up] [2:NewProb][ENTER]ENTER]

Hope it helps.

Sep 30, 2009 | Texas Instruments TI-89 Calculator

### I cannot plot graph in my Ti 89 graphing calculator

That means one (or more) of the variables you have in your function is not defined. Check to make sure you didn't misspell any variable name. Also, check to make sure you didn't run two variable names together. "ab" is the variable ab, not a times b.

Mar 19, 2009 | Texas Instruments TI-84 Plus Calculator

## Open Questions:

#### Related Topics:

58 people viewed this question

Level 3 Expert

Level 2 Expert