Question about Texas Instruments TI-84 Plus Calculator

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How to set a ti-84 to graph both sides of the equation separately on the same coordinate system.

Posted by patrickandbo on

  • k24674 Jun 29, 2011

    Would you mind giving more information about what you want to do. Give an example and we will see what can be done.



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If I'm understanding you correctly, you want to graph something like


If this is correct, graph 5x+3 in the y1 line and 9 in the y2 line. To find the solution, you will press 2nd, then trace the intersection and hit enter 3 times. This will get the solution you need for the equation.

If this is not what you are wanting to do, you need to be try again and elaborate more.

Posted on Jul 01, 2011


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1 Answer

How do i find slope and then graph it

Select two points P1 and P2 on the line. Read their coordinates P1(X_1, Y_1), and P2(X_2, Y_2). If the points are given to you that is even better: you will not have to approximate their coordinates.
The slope of the straight line that passes through P1 and P2 is the ratio s=(Y_2-Y_1)/(X_2-X_1).
A slope is a number and cannot be graphed. The line that has the slope can be graphed if you have its complete equation y=slope*x + initial value.
To graph a curve on the TI84 open the Y= editor, type in the second member (right side) of the function say on line Y1= then press the Graph function key.

Feb 05, 2013 | Texas Instruments TI-84 Plus Calculator

1 Answer

How to use ti 84 plus calculator to graph linear equations

You have to use Y Editor to define functions on the both sides of the equation and then graph it. Finally option is F5: Intersection.
See captured images for equation 5x+10=-2x-7, y1=5x+10, y2=-2x-7 and x=-17/7



Feb 25, 2012 | Texas Instruments TI-89 Calculator

1 Answer

When graphing and equation how to I put it plus or minus

You can't have a function return two results. You can graph it as two separate equations, one for the plus case and one for the minus case.

Nov 19, 2010 | Texas Instruments TI-84 Plus Calculator

1 Answer

Graphing an equation

Press the Y= key to invoke the Y= editor. Enter in your equation.

Press the WINDOW key to set the window parameters.

Press the GRAPH key to have the calculator graph the equation.

For more details and options, see the "Function Graphing" chapter in the Guidebook.

Nov 11, 2009 | Office Equipment & Supplies

2 Answers

How do i solve this problem 3x+25=5x using my TI 84 plus

i think there are programs but with something as simple as that you should be able to work it out manually....
x=25/2 or 12.5

Jul 05, 2009 | Texas Instruments TI-84 Plus Calculator

1 Answer

Ti 84 plus problem

The calculator only displays from -10 to 10 on the x and y axes, and both of your lines are outside of that range. However, it is easy to change that.

1. Hit the gray "WINDOW" button that is directly under the screen
2. Change "Xmax" to 150
3. Change "Ymax" to 200

Remember to change both of those values back to 10 when you are done with this problem!

Here's how to graph it:
1. Hit the "Y=" button
2. Enter your first equation after Y1, and your second equation after Y2
3. Look over both the equations to make sure you typed them correctly
4. Hit the "GRAPH" button
5. If you don't see the intersection you will need to adjust Xmax and Ymax again
6. Hit Hit "2ND" and the "TRACE" to bring up the "CALC" menu
7. Scroll down to "intersect" and hit enter
8. Hit enter 3 times (You use the first and second curve options when you have more than 2 lines)
9. It should display the coordinates at the bottom
10. I got (76, 142.1) for the intersection

Thanks for asking this question! I used to do this a much harder way, but while I was calculating the answer to your question I hit a wrong button and accidentally found this method!

Jun 30, 2009 | Texas Instruments TI-84 Plus Calculator

2 Answers

How do you set up window range?

or press ZOOM, option 6 (ZStandard).  That instantly resets the window range.

Jan 20, 2009 | Texas Instruments TI-84 Plus Silver...

1 Answer

Graph and trace buttons don't work

This is probably because you have the stat plot on. You would need to go to y= and then go to the top where it says stat plot 1 and un highlight it if it is highligted. That should fix your problem.

Sep 16, 2008 | Texas Instruments TI-84 Plus Silver...

2 Answers


The first solution will allow you to watch your calculator graph two equations simultaneously rather than finishing one before graphing the next; it won't solve the problem of having the calculator unselect one equation when you select a second. To fix that problem, try the following:

In order to select additional graphs, the Transformation Graphing App will need to be uninstalled from the TI-83 Plus Family and TI-84 Plus Family. Uninstalling the App does not erase it from the calculator, it disables it from interfering with the normal graphing modes. Below are the steps to successfully uninstall the App.
  • Press [APPS] key
  • Select Transfrm from the menu
  • Press 1:Uninstall
The illustration and solution are courtesy of Jesse Phillips, who cites this page from the Texas Instruments support site

- doug garfinkel, Children's Day School

Jan 15, 2008 | Texas Instruments TI-84 Plus Silver...

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