Question about Texas Instruments TI-84 Plus Silver Edition Graphic Calculator

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Graphs with asymptotes connect?

I just got my calculator reset and i reinstalled some of the applications but now while plotting graphs such as (2x+1)/(x+1) which have oblique asymptotes or even vertical asymptotes like 1/x, there seems to be a line that connects the two parts. I don't remember this happening before as the graph just go along their asymptotes. Is this something to do with the settings?

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The calculator can't tell the difference between a function with an aymptote and a function that rapidly goes from a large positive number to a large negative number in one step.

One way around this is to plot with the asymptote at one edge. Press the WINDOW key and change the limits. Another way is to change the plot type from Line to Dots. Press Y= to enter the Y= editor, select the function being plotted, press Left to highlight the = sign, then press ENTER repeatedly to cycle through the different graph styles.

Posted on Jan 23, 2010

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Can i plot graphs using fx 115 es?


The fx-115ES is not a graphics calculator so it will not display graphs on its screen. You can use it to make graphs by calculating the points and plotting them on graph paper.

Mar 12, 2011 | Casio FX-115ES Scientific Calculator

1 Answer

Graphs on some TI-84's and TI-83's appear connected where asymptotes should be, like f(x) = 2/(x-squared - 1). Most don't show these connections. How do I get rid of them.


I have drawn the curve for your function. On my TI84Plus with OS version 2.53MP the spurious asymptotes do not show, while on a TI83PLUS OS 1.12 they do if the graph is drawn as connected lines. It might be a bug that was corrected in newer OS (for TI84PLUS)
ac1a7aa.jpg1d5792c.jpg
3a79c11.jpg
3ab7406.jpg
The graph from a TI83PLUS (the last one above) shows asymptotes when drawn connected, but no asymptotes appear if graph is drawn dotted.
2d0269e.jpg.

Sep 29, 2010 | Texas Instruments TI-84 Plus Silver...

1 Answer

How can i turn off vertical asymptotes on a ti-83 plus


The asymptote you see is in truth a spurious effect. It appears when you draw connected graphs. There is no command that turns that "non-existing feature" ON and OFF.
If you do not want to see the "asymptote" draw dotted graphs. The drawback is that you will have fewer points near the asymptote because the curve grows too fast. If you decrease the x-step to have more points, the graph will take longer and you may run out of RAM.

Sep 19, 2010 | Texas Instruments TI-84 Plus Silver...

1 Answer

Calculator is drawing vertical asymtotes.


There is no vertical (or otherwise) asymptote feature on a TI84PLUS. It seems to you that the calculator is drawing the asymptote. However when you plot a CONNECTED Graph a line is drawn from one point to the next: The last point on one side of the asymptote is thus connected to the first point on the other side, effectively mimicking the drawing of the asymptote.
To get rid of this spurious effect, draw dotted graphs, but you will see fewer points, because the points are drawn at constant intervals in X. This is set by the Xres variable, in the Window configuration screen.

Here is a function that will "show" you a vertical asymptote on the TI84PLus, when graph is drawn connected, but on a calculator with a higher resolution, you see none. A calculator cannot handle infinity. You can with the help of your mind's sight, so to speak, see the asymptote on the graph.

9246520.jpg

Aug 20, 2010 | Texas Instruments TI-84 Plus Silver...

1 Answer

When I put an equation into y=, there are arrows to the left, I don't know why


A) Before drawing function Y1=f(X), R1=F(Theta), (X1=f(T0, 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 functionality 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

    Press1:Uninstall.
    Graphing functionality will revert to the native OS

Mar 17, 2010 | Texas Instruments TI-84 Plus Calculator

1 Answer

Having problem with ti 83 calculator everytime i graph it read error invalid dimensions


You must deactivate the statistical plots. If you do statistical graphs, the graphing is reconfigured in a way that happens to be incompatible with regular fuction graphs.

  1. To deactivate the statistical plots.
  2. Press [2nd][Y=] to access the (STAT PLOT) menu.
  3. Press [4:PlotsOff][ENTER].
  4. Calculator displays Done.
  5. You are ready to draw the function graphs.

Feb 15, 2010 | Texas Instruments TI-83 Plus Calculator

1 Answer

Plotting graphs


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.

Press the [Apps] key. Scroll down or up to reach the Transfm application. Select it and press [ENTER]. If that application was running you will see a new screen that tells you some t
Transfrm App
1:Uninstall
2:Continue

Press1:Uninstall.
Graphing functionalities will revert to the native OS

Another potential culprit is the Inequalz App. To uninstall it, do as for the Transfm and select the option that will unload it from memory.

Jan 09, 2010 | Texas Instruments TI-84 Plus Calculator

1 Answer

It says invalid dim when try to plot and in window it has shaderes=3 or something like that. And also it shows inequalities at the bottom and some ****.


Hi,
You are running the application called Inequalz. It can be used to plot inequality graphs. You must uninstall it (NOT DELETE) to return to the normal calculator configuration.
Press [APPS]. Scroll down to find Inequalz. Highlight its number in the list and press {ENTER]. You will see a screen Inequal Running and
  1. Continue
  2. Quit Inequal
  3. 3:About.
Press [2:Quit ..]
Your calculator will unload it out of memory.
Reset the RAM and restart the graphs.

Hope it helps.

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

1 Answer

How do I turn off the vertical asymptote feature?


Hello,
There is no vertical (or otherwise) asymptote feature on a TI84PLUS. It seems to you that the calculator is drawing the asymptote. However when you plot a CONNECTED Graph a line is drawn from one point to the next: The last point on one side of the asymptopte is thus connected to the fisrt point on the other side, effectively mimicking the drawing of the asymptote.
To get rid of this spurious effect, draw dotted graphs, but you will see fewer points, because the points are drawn at constant intervals in X. This is set by the Xres variable, in the Window configuration screen.

Hope it helps.

Nov 05, 2009 | Texas Instruments TI-84 Plus Silver...

1 Answer

TI-84 silver: Black arrow instead of line in function mode


Hello,
I have answered this question multiple times. I have no idea why you calculator refuses to allow you to choose more graph styles. Maybe you should reset it by clearing the RAM.
Concerning the connected asymptotes.
In truth your function has one aymptote namely the straight line x=2 but your graph has two asymptotic branches, one tends towards -infinity, the other toward + infinity. That they seem connected is an illusion due to the finite resolution of the screen. This is made worse if you select a connected graph instead of a dotted one. I am enclosing a screen capture of the graph for the same function, drawn on a calculator with better resolution.

ea9382c.jpg

This clarification being given, it remains that you still have a problem since you cannot choose other styles. Do try to reset the RAM, and choose dotted graphs. If that does not work, maybe you should update the OS or reinstall it from education.ti.com.
I hope it solves your problem. If it does not, do not blame me, and remember that I tried my best.

Oct 16, 2009 | Texas Instruments TI-84 Plus Silver...

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