Question about Texas Instruments TI-84 Plus Calculator

# How can I get my calculator to highlight more than one function, to graph a circle for example?

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• Texas Instru... Master

Hello,

Suppose you want to draw the circle the equation of which is X^2+Y^2=4, a circle centered at the origin with radius 2.
When you isolate Y^2 and then extarct the squre root you obtain two solutions, call them Y1 and Y2
Y1=SQRT(4-X^2), Y2= -SQRT(4-X^2)
You press[Y=] and type in the right hand side of the equations above, one in Y1= and the other in Y2. Press [GRAPH].

Ih a graphic does not appear within the scree window adjust the window parameters ( [WINDOW]) or Press [ZOOM] and select ZoomIn, ZoomOut, ZoomSTD, etc.

Explore the program Draw accessible by pressing [2nd][DRAW].

Hope it helps

Posted on Sep 04, 2009

• k24674 Sep 04, 2009

Sorry for the typos. I wrote this solution once and upon attempting to post, I got a message to the effect that the server is too busy and I lost my post. I did not want to have to write the solution a third time.

• k24674 Oct 28, 2009

Move the cursor on the equal sign (=) to the right of Y1 , highlight the equal sign and press [ENTER]. Make sure that equal sign remains highlighted when cursor moves to another location.

If there are still problems, reset the RAM by pressing [2nd][MEM][7:RESET][1:All Ram][2:Reset] [ENTER]. Press [CLEAR] to erase Ram Cleared Message.

• alexintulsa Aug 28, 2012

You didn't answer how to highlight more than just Y1... He's trying to make it so he can compare graphs. He needs it to draw Y1 and Y2 at the same time. How do you highlight both at the same time?

• alexintulsa Aug 28, 2012

You didn't answer how to highlight both Y1 and Y2 at the same time so that you can graph both and compare...

• k24674 Aug 28, 2012

On the Y= editor screen, use the back arrow on a line Y=, highlight the = sign and press Enter. Both = signs must be highlighted. If only one is highlited, that is the function that will be graphed. As to comparing , I do not believe there is much to say. Each part is the reflection of the other with respect to the y=0 (the x-axis) line.

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Posted on Jan 02, 2017

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## Related Questions:

### Is the graph of a circle a function?

No. The graph of a circle is a graph, one which can have two different values for certain arguments. The graph of the top or bottom half of a circle can be considered a graph of a function.

Jan 08, 2014 | Texas Instruments TI-84 Plus Calculator

### My TI-84 Plus won't let me graph trigonometric functions.

Is it somehow preventing you from graphing, or are you simply not getting the graph you expect?

Most likely you have the angular mode set wrong. You probably want it set to radians. Press MODE, move to the third line, highlight RADIAN, press ENTER, then 2ND [QUIT].

If it's not the angular mode, please reply to this post and give an example or two.

Mar 22, 2013 | Texas Instruments TI-84 Plus Calculator

### My fx-9750GA PLUS wont graph lines, cicles or paraballas

To draw functions (regular, parametric, polar, sequences) use the application graph: Highloghted on 1st screen capture. The second screen captures shows you the functions y=f(x). enter a legal expression and press F6 Draw. To set TYPE press the key under TYPE.

To draw conics (circles, parabolas, hyperbolas, and ellipses) use the CONiCS applications. (See 3rd screen ). On 4th capture the equation highlight is one for the parabola. y=x^2

Scroll down or up examining the small graphs. They will show you which equation form to choose.
For the circles

Jun 19, 2011 | Casio FX-9750GPlus Calculator

### My calculator wont graph more than one function at a time, how can i fix that?

Hi Lexy,
Chances are, your calculator has a program called "Transfrm" on it that is preventing the calculator from graphing more than one function at a time. Luckily this is easily remedied.

1) Turn calculator on and press the "APPS" key.
2) Scroll down (towards the bottom of the list) and find the "Transfrm" program.
3) With the program highlighted, press the "Enter" key.
4) Highlight the "Uninstall" option and press "Enter".

Once the program is uninstalled, the graphing function of the calculator should be working correctly, allowing you to graph more than one function at a time.

Hope this helps :-)

Dec 01, 2010 | Texas Instruments TI-84 Plus Calculator

### How do you graph an equation on the calculator? For example, my equation is y=-1.5x 2.

All right, I will show you how to draw a simple function such as y=5*X 2. The method is the same reagrdless of the complexity of the function.

1. Turn calculator ON. If you do not see several icons press [MENU].
2. Use arrow to select the [GRAPH] application and press [EXE].
3. In the entry screen, the line with Y1= is highlighted. If it is not, use arrow to highlight it.
4. Press the right arrow, the highlighting disappears leaving you with Y1= and the blinking cursor.
5. At the position of the cursor type 5 then press the [X, theta,T] key, under the [ALPHA]. On the screen appears 5X, complete your equation by typing [ ] 2
6. Press [EXE] to store function.
7. If you want to draw other functions, it is time to do so on that screen.
8. When done, press [F6:Draw].
9. If the screen does not show a lot of the function, you can use the arrow keys to pan (move the center of the graph. You can pan Up, Down, Left, or Right.
10. You can also press [SHIFT][V-Window] to set the window limits.

Sep 15, 2010 | Casio CFX-9850G Plus Calculator

### How do i graph?

The fact that you are asking how to graph makes believe that you solved the problem about 'invalid dimension' . I am glad that worked for you.

This

1. Prepare calculator for graphing
Turn StatPlotsOff to avoid errors:

Press [2nd][STATPLOT][4:PlotsOff][ENTER].

2. Setup Graph type
• Press [MODE] key.
• In Mode set up screen, make set the angle unit (if you are drawing trigonometric functions)..
• Use the arrows to move cursor to 3rd line to highlight degree or radian and press [ENTER]. The important thing is that you be aware of the unit so that you do not get unexpected results.
• On same screen, verify that Func is highlighted. If you are drawing PARametric plots, POLar plots or SEQuence plots, you highlight the relevant item in the list
• If it is not, use arrow to highlight Func and press [ENTER] to validate.
• Do not worry if you do not have exactly the same screen as in the screen picture (We may have different OS Versions)

3. Entering the functions to draw (assuming you want to draw y= functions)
• Press [Y=] to enter function editor.
• Type in a function
• Press [ENTER] at the end of each function.
• Before pressing [GRAPH], make sure that all the = signs that define the functions to be graphed are highlighted white on black. If one is not highlighted, use arrow to move cursor on the sign and press [ENTER].
• In the screen capture 4 functions are slated to be drawn.

4. Selecting the Graph Style (You may ignore this now, because it is unimportant for just one graph)
• Select the graph style: The small piece of line to the left of a Y that defines a function is the style.
• Move cursor on it and press [ENTER] .
• Each [ENTER] (on same line) selects another style.
• On the next screen you have all the styles available on the calculator.
• Do not select the bubble on line 6: It is for animations. It will not leave a trace at the end of the plot.

5. Drawing the Graphs
• Press [GRAPH] to see the graphs.
• If one of them is missing, verify that its = is still highlighted, then use the [WINDOW] to set the Window dimensions,
• Here are the dimensions of the standard window

6. ZOOMING
You can also press [ZOOM] to adjust.

The selection 6:ZStandard sets the dimensions as on the screen Titled Window (above).

Sep 08, 2010 | Texas Instruments TI-84 Plus Silver...

### How can i draw graph.

1. Prepare calculator for graphing
Turn StatPlotsOff to avoid errors:

Press [2nd][STATPLOT][4:PlotsOff][ENTER].

2. Setup Graph type
• Press [MODE] key.
• In Mode set up screen, make set the angle unit (if you are drawing trigonometric functions)..
• Use the arrows to move cursor to 3rd line to highlight degree or radian and press [ENTER]. The important thing is that you be aware of the unit so that you do not get unexpected results.
• On same screen, verify that Func is highlighted. If you are drawing PARametric plots, POLar plots or SEQuence plots, you highlight the relevant item in the list
• If it is not, use arrow to highlight Func and press [ENTER] to validate.
• Do not worry if you do not have exactly the same screen as in the screen picture (We may have different OS Versions)

3. Entering the functions to draw (assuming you want to draw y= functions)
• Press [Y=] to enter function editor.
• Type in a function
• Press [ENTER] at the end of each function.
• Before pressing [GRAPH], make sure that all the = signs that define the functions to be graphed are highlighted white on black. If one is not highlighted, use arrow to move cursor on the sign and press [ENTER].
• In the screen capture 4 functions are slated to be drawn.

4. Selecting the Graph Style (You may ignore this now, because it is unimportant for just one graph)
• Select the graph style: The small piece of line to the left of a Y that defines a function is the style.
• Move cursor on it and press [ENTER] .
• Each [ENTER] (on same line) selects another style.
• On the next screen you have all the styles available on the calculator.
• Do not select the bubble on line 6: It is for animations. It will not leave a trace at the end of the plot.

5. Drawing the Graphs
• Press [GRAPH] to see the graphs.
• If one of them is missing, verify that its = is still highlighted, then use the [WINDOW] to set the Window dimensions,
• Here are the dimensions of the standard window

6. ZOOMING
You can also press [ZOOM] to adjust.

The selection 6:ZStandard sets the dimensions as on the screen Titled Window (above).

Sep 03, 2010 | Texas Instruments TI-83 Plus Calculator

### I can't graph on ,y ti 84...

Prepare calculator to graph

Turn StatPlotsOff to avoid errors:
Press [2nd][STATPLOT][4:PlotsOff][ENTER].

Setup Graph type
• Press [MODE] key.
• In Mode set up screen, make set the angle unit (if you are drawing trigonometric functions)..
• Use the arrows to move cursor to 3rd line to highlight degree or radian and press [ENTER]. The important thing is that you be aware of the unit so that you do not get unexpected results.
• On same screen, verify that Func is highlighted. If you are drawing PARametric plots, POLar plots or SEQuence plots, you highlight the relevant item in the list
• If it is not, use arrow to highlight Func and press [ENTER] to validate.
• Do not worry if you do not have exactly the same screen as in the screen picture (We may have different OS Versions)

Entering the functions to draw (assuming you want to draw y= functions)
• Press [Y=] to enter function editor.
• Type in a function
• Press [ENTER] at the end of each function.
• Before pressing [GRAPH], make sure that all the = signs that define the functions to be graphed are highlighted white on black. If one is not highlighted, use arrow to move cursor on the sign and press [ENTER].
• In the screen capture 4 functions are slated to be drawn.

Selecting the Graph Style (You may ignore this now, because it is unimportant for just one graph)
• Select the graph style: The small piece of line to the left of a Y that defines a function is the style.
• Move cursor on it and press [ENTER] .
• Each [ENTER] (on same line) selects another style.
• On the next screen you have all the styles available on the calculator.
• Do not select the bubble on line 6: It is for animations. It will not leave a trace at the end of the plot.

Drawing the Graphs
• Press [GRAPH] to see the graphs.
• If one of them is missing, verify that its = is still highlighted, then use the [WINDOW] to set the Window dimensions,
• Here are the dimensions of the standard window

ZOOMING
You can also press [ZOOM] to adjust.

The selection 6:ZStandard sets the dimensions as on the screen Titled Window (above).

May 19, 2010 | Texas Instruments TI-83 Plus Silver...

### Cannot graph

Prepare calculator to graph

Turn StatPlotsOff to avoid errors:
Press [2nd][STATPLOT][4:PlotsOff][ENTER].

Setup Graph type
• Press [MODE] key.
• In Mode set up screen, make set the angle unit (if you are drawing trigonometric functions)..
• Use the arrows to move cursor to 3rd line to highlight degree or radian and press [ENTER]. The important thing is that you be aware of the unit so that you do not get unexpected results.
• On same screen, verify that Func is highlighted. If you are drawing PARametric plots, POLar plots or SEQuence plots, you highlight the relevant item in the list
• If it is not, use arrow to highlight Func and press [ENTER] to validate.
• Do not worry if you do not have exactly the same screen as in the screen picture (We may have different OS Versions)

Entering the functions to draw (assuming you want to draw y= functions)
• Press [Y=] to enter function editor.
• Type in a function
• Press [ENTER] at the end of each function.
• Before pressing [GRAPH], make sure that all the = signs that define the functions to be graphed are highlighted white on black. If one is not highlighted, use arrow to move cursor on the sign and press [ENTER].
• In the screen capture 4 functions are slated to be drawn.

Selecting the Graph Style (You may ignore this now, because it is unimportant for just one graph)
• Select the graph style: The small piece of line to the left of a Y that defines a function is the style.
• Move cursor on it and press [ENTER] .
• Each [ENTER] (on same line) selects another style.
• On the next screen you have all the styles available on the calculator.
• Do not select the bubble on line 6: It is for animations. It will not leave a trace at the end of the plot.

Drawing the Graphs
• Press [GRAPH] to see the graphs.
• If one of them is missing, verify that its = is still highlighted, then use the [WINDOW] to set the Window dimensions,
• Here are the dimensions of the standard window

ZOOMING
You can also press [ZOOM] to adjust.

The selection 6:ZStandard sets the dimensions as on the screen Titled Window (above).

Apr 25, 2010 | Texas Instruments TI-84 Plus Calculator

### When graphing the calculator only allows me to graph on function. When typing in a new function the first function that was highlighted became unhighlighted and only the new function is highlighted now.

If you ran the dynamic graphing application called Transfrm you will only see one graph. It takes over the graphing from the native OS.
You will recognize it by the graph style at the left of the Y1=, etc. as in picture

As you can see, only one = is highlighted, meaning only Y1 will be drawn. To recover the native Y= screen, you must unload the Transfrm App from memory.

Here is how to do it.
Exit what you are doing and go to main calculator screen.
Press the Apps button.
Scroll down to find the Transfrm App
Highlight the : before the name and press ENTER.
The screen appears as on the second screen capture above
Press 1:Uninstall
This will unload it from memory and you will be able to draw multiples graphs.

There is the possibility that the failure to draw multiple graph has nothing to do with Transfrm. In that case it is most likely due to the Stat Plots being turned ON. Turn them OFF

Press [2nd][Y=] (STAT PLOT)
Select [4:PlotsOff] and press [ENTER]

Dec 30, 2009 | Texas Instruments TI-84 Plus Silver...

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