Question about Texas Instruments TI-84 Plus Calculator

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Graphics I can't draw graphics (functions). It appears some strange words and I don't know how to continue.. Do you know how to solve this problem?

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Press 2nd and catalog(0) and then press the cos button and select FnOn and then press 2nd draw(prgm) and hit ClrDraw. Then press 2nd and format(zoom) and then turn coordinates on and axes on if they are not. That should fix it.

Posted on Dec 04, 2008

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How to solve y3-113y2+350=0

You can try to factor the polynomial. If not you can find approximate roots graphically: You draw the function y=x^3-113x^2+350 then examine the graph to locate the zeros, i.e the values of x where the function is equal to zero.

Jun 22, 2013 | Casio Fx-570es Scientific Calculator

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I can not get the Y2, Y3, Y4, etc. to work on my TI-84 Plus

If you have used the Transfrm app before it remains in memory and prevent drawing more than one function. Tou must uninstall it.
Press Apps, select Transfrm, and run it. You will get a screen where you are asked to continue or uninstall. Select Uninstall and press Enter.
After unistalling Transfrm you will be able to graph more than one function,

Mar 24, 2013 | Texas Instruments TI-84 Plus Silver...

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I can't put two graphics in te same time

One application (Transform) is still charged in RAM and which takes over graphing from the OS. You must unload the culprit it from memory.
Press the APPS button. Scroll Down till you reach TRansform. Highlight the line and press ENTER. You will be invited to continue or Uninstall. Select Uninstall and press Enter. Open the Y= editor to type in other functions.

Apr 13, 2012 | Texas Instruments TI-84 Plus Calculator

1 Answer

How do you solve equations like 4x+5y=12

You cannot solve this equation,at least not in the regular meaning of solving which is to find the roots. This is a relation linking two variables x and y, in other words a function. There are an infinite number of orderd pairs tha satisfy this equation.
You can draw it as y=1/5(-4x 12) but your calculator cannot graph.
If you want to use the Solve( command on this calculator you must supply the value of y.

Sep 23, 2010 | Casio FX-115ES Scientific Calculator

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Casio fx-9860G graphics calculater, vertical line segment

I am not sure how you can create such function (the range limitation do not work for x=c) but you can draw a vertical segment, just do not call it a function.

Draw a graph Y1=0
Then press SKETCH function key and use the F6 key to cycle through the TABS at the bottom of the screen. Look for the TAB named PEN. and click the function key below it.

Use the arrows to move the cursor to a spot on the screen (near the bottom), Press EXE to fix the starting point of the segment. Then use the Up arrow to draw a vertical segment from bottom to top.

May 01, 2010 | Casio FX-9860G Graphic Calculator

1 Answer

The calculator doesnt graph two equation on the graph

A) Before drawing function Y1=f(X), R1=F(Theta), (X1=f(T), Y1=f(T))
you should turn the statistical plots OFF.
To turn statistical plots off
  1. Press [2nd][Y=] to open the (STAT PLOT) menu.
  2. Select [4:PlotsOff] and
  3. Press [ENTER].
  4. Calculator displays Done
  5. Restart your graphs.
  6. Adjust the window dimensions if necessary or use the ZOOM function to have all graphs displayed.
B) If you cannot draw more than one function

Usually as soon as you start entering an expression in the Y= editor screen, the = sign is highlighted to ensure the drawing of a function. However, if you have previously used the Transfm application to draw dynamic graphs, it takes over the graphing functionalities from the native OS and you can only draw a single graph.
The reason is that dynamic graphing needs one or two parameters that can be changed during the graphing process and the graph redrawn with a new value of a parameter, and you end up with a family of curves differing one from the other by the values of one parameters. But since the calculator has space for 10 graphs at most, only one function can be highlighted.

To make a long story short, you must Uninstall the Transfrm application from memory. The procedure will not erase it, just kick it out of memory.
  1. Press the [Apps] key.
  2. Scroll down or up to reach the Transfmapplication.
  3. Select it and press [ENTER].
  4. If that application was running you will see a new screen that tells you some thing like
    • Transfrm App
    • 1:Uninstall
    • 2:Continue

    Graphing functionalities will revert to the native OS

Another potential culprit is the Inequalz App. You recognize that Inequalz is runnibg if the [ Y=] editor screen shows tabs at the bottom

To uninstall it, do as for the Transfm and select the option that will unload it from memory.
  1. Press [Apps]
  2. Select [ : Inequalz]
  3. Screen displays INEQUAL RUNNING
  • [1:Continue]
  • [2:Quit Inequal]
  • 3:About]
Press [2:Quit Inequal]

Mar 17, 2010 | Texas Instruments TI-84 Plus Silver...

1 Answer

When you have a problem like that ex: 5-x^2 = x -9, how do you know what to set the ymin, ymax at in order to get ur answers to solve

Half of the work involved in solving a problem is being able to formulate it so that it can be solved. I am afraid your formulation leaves too many details in the dark.
But I think I figured out what you want.
"You want to solve the equation graphically, ie find the zeros of a function"

  1. Create a single expression from the equation : gather all terms on one side so as to make "expression"=0
  2. One such expression is X^2 +X -14=0
  3. Draw the function y=X^2+X-14
  4. Find the X-coordinates of the points where y=0
If that is the method you had in mind, it does not matter what specific values you set for Ymin and Ymax, because you are interested in Y values near Zero. You have to make sure the X-axis appears on the screen.
I assume you know how to use the [2nd][TRACE] (CALC) [2:Zero] function to find the zeros.

Here is the negative one Here is the positive one

The second method entails
  1. defining two functions, Y1=-X^2+5 and Y2=X-9,
  2. Graphing the two functions.
  3. Finding their intersections.
  4. The X-Values of the two points of intersection of Y1 and Y2 are the solutions of the equation.
Here is the graph in standard window dimensions
As you see, one root does not show and you have either to Zoom out or move the Yrange downward (as seen on the right picture for which I set Ymin=-15, Ymax=5

I assume you know how to find the intersection of the two curves, and I will show you only one point.
To find the intersection you use the [2nd][TRACE] (CALC) [5:Intersect] command

Jan 29, 2010 | Texas Instruments TI-84 Plus Calculator

1 Answer

Casio fx-7400G PLUS cubic solver?

First let us repair the terminology.

  1. You can evaluate any expression (find the value of any expression for a particular value of its variable).Store a value in the variable, say X. Key in the expression and press [EXE].
  2. You can consider your expression(should not contain a relational operator such as =, greater than, less than, greater than or equal to, less than or equal to) to be a function Y1(x) = expression and graph it, or generate a table for it. You will have several values of the function calculated at various points.
  3. You can set your expression equal to 0 and find the particular value(s) of the variable (the unknown) that make the equality TRUE. That is called solving an equation.
I am not sure that it has a solver (solving an equation or an inequation) but you can always draw your expression as a function and explore the graph (SKTCH) to locate the roots (or zeros) of the functions (the values of the variable where the function equals zero.) That is called solving graphically.

Hope it helps.
Thank you for using FixYa and for rating this solution.

Nov 05, 2009 | Casio FX-7400G Plus 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

When tracing a graph, instead of x and y there is R and O. and they have different value than x, Y. how do i fix back to X and Y??


Your calculator can draw different kinds of graphics ( Functions, Parametric, Polar, and Sequences).

Apparently, yours is configured to draw in Polar mode, where the variables are named r, the radius, and Theta (a horizontaly barred O) the angle .

To draw the usual y=f(x) graphics,
Press the MODE key/button then look for the 4th line that displays Func, Par, Pol, Seq
Use the left arrow to highlight Func. It will blink. Press ENTER to validate your choice.

After that, Press 2nd MODE and you will get back to the calculation screen.

Then you Press key Y= and start keying in the desired function.

Hope it helps

Mar 28, 2009 | Texas Instruments TI-84 Plus Calculator

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