Question about Texas Instruments TI-84 Plus Calculator

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My calc can only display one function on the graph part at a time, and has a strange icon beside the Y1 ,Y2,...etc it looks like an arrow. How do i get it back to normal?

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At some time or other you executed the Transfrm Application. I remains in ram and takes over the graphing duties from the native OS. You must unload it from memory. Do not worry this will not delete it.
To unload it from RAM

  1. Press the APPS button.
  2. In the list of APPS look for Transfm. You will have to scroll down or Up (faster) to get to it.
  3. Select it and press [ENTER]
  4. A new screen is displayed inviting you to Uninstall or Continue.
  5. Press the number key corresponding to Uninstall.
Return to the [Y=] function editor to type in the functions to graph. Make sure that the = signs after the Y1,Y2, are highlighted. If one of them is not highlighted, move cursor on = and press ENTER

Posted on Sep 19, 2010

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1 Answer

Can't get the calc to graph two equations at the same time after they have been entered into y=


1.) make sure the two lines are not the same line

2.) under the y= button, when you enter the two equations make sure for both y1 and y2 the icon on the far left for both is a solid \ and the = on the right of y1 and y2 should be highlighted.

3.) clear memory if all else fails as a last resort.

hope this helps

Apr 27, 2010 | Texas Instruments TI-84 Plus Calculator

1 Answer

Functions don't work


The presence of the Fat arrows to the left of the Y1, Y2,etc = functions means that the Transfrm application is running. It takes over the graphing from the native OS.
You must uninstall it.
  1. Press [APPS] and scroll up to go to the bottom of the list of Applications.
  2. Highlight [ : Transfm] and press [ENTER]
  3. In the new screen with the heading "Transfm App" press the number that corresponds to uninstalling the Apps [1:Uninstall]
  4. Try to graph two simple functions Y1=X and Y2=2X.
  5. If these functions are graphed correctly you are back in business, if not turn Stats Plots off.
To turn Stat plots Off
Press [2nd][Y=] (Stat Plot)
Press [4:PlotsOff]
Press [ENTER]

If all else fails, Reset the Ram
Press [2nd][+] (MEM)
Press [7:Reset]
Press [1:All Ram]
Press [2:Reset]
Press [ENTER]
Press [CLEAR] to erase the "Ram Cleared" Message.

Jan 27, 2010 | Texas Instruments TI-84 Plus Calculator

1 Answer

Problem graphing..


This is my last post. It seems that I squanderd my time for zilch. There is a simple way to reset the defaults or the RAM. I stopped suggesting it because ..(what is the point?).
Press [2nd][MEM][7:Reset][1:All Ram][2:Yes] [ENTER]. Message RAM cleared is displayed on screen. Press [CLEAR] key. Screen should clear the message.
If that does not solve your problem..

Oct 06, 2009 | Texas Instruments TI-83 Plus Silver...

1 Answer

How do I use stat plot to graph a set of points?


Hello,
1.Press [MODE], scroll to set Function graphing mode.
2.Press [STAT] [5:SetUpEditor], command is pasted in home screen. Press [ENTER]. Screen displays Done. This clears old values in lists

3. Press [STAT][1:Edit] to enter data.
Press [ENTER] after each number. Cursor moves to next row. After finishing the data of Listt L1, use arrow right and UP to the head of list L2. Enter the values in list L2. Press Enter after last element.

4. Press [Y=] to display Y= editor. Clear function Y1 and all functions or remove highlight from the = in Y2, Y3, etc.
5.Press [2nd][STATPLOT]1 to select 1:Plot1

9d0ac15.jpg
The blinking cursor on ON means graph will be drawn. Type chosen is Scatter plot. Mark chosen is a dot.

Press [ZOOM][9:ZoomStat]
30b32c1.jpg
If you think that the curve look like a straight line you can try to do a linear regression.
Press [STAT] Arrow right to highlight [CALC]
Select [4: LinReg(ax+b)]

ccb85ed.jpg

LinReg(ax+b) echoes on run screen. Press [2nd] L1 Press comma, Press [2nd] L2 press comma Press [VARS] Arrow right to select [Y:VARs][1:Function] [ENTER][1:Y1]

68a28f1.jpgENTER
ff52832.jpg
That is the equation for the linear regression. As you see eqaution has been saved in Y1. Press [GRAPH] to get the data and the regression curve drawn on same graph.
aafb6d8.jpg

Hope it helps.


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

1 Answer

My TI--84 plus calculator won't display the 7 graph modes, and it won't graph equations simultaneously. What is wrong? I can only get an arrow icon and an arrow-bar icon.


Hello,
Use the [Y=] entry screen to enter the functions you want to graph. Make sure that the = sign after Y1, Y2 etc. is highlighted (black). If the = sign is not highlighted the corresponding function will not be drawn. You can can up to 10 functions, but what is the point of drawing so many if they overlap?
Anyway, to change the graph style of the curve for a particular function, use arrows to move to the line, then use left arrow to the bit of line that appears to the left of the Y. Highlight the segment an press ENTER. Each time you press ENTER the style changes to another one. Beware of the unconnected bubble style. During the drawing it will show the position of the point being drawn, but at the end, the whole curve, so to speak, evaporates.
As to simultaneous graphs, if it is important to you to have the graphs drawn for all the curves at the same time, you can enforce that by pressing [MODE], and using down arrow to reach the 6th line Sequential Simul. Use the right arrow to highlight Simul and press ENTER.
Whether drawn sequentially or simultaneously, all graphs will be displayed, except for the ones with the unconnected bubble as style.

Hope it helps.

Oct 02, 2009 | Texas Instruments TI-84 Plus Calculator

1 Answer

I can't graph more than one equation in the y= area of my Ti 84+


Hello,
The marking that so puzzle you define the type of line (or dots) to represent the graphs. Enter as many functions as there are Y variables.
After entering a function press [ENTER] to jump to the next one.
When finished entering all functions press GRAPH. If you want graphs drawn one after the other, in MODE highlight Sequential (6th line) and press ENTER. If you want graphs drawn simultaneously, in MODE (6th line) highlight Simul and press ENTER. Press 2ND QUIT to return to previous screen . Execute graph again.
Hope itr helps.

Sep 23, 2009 | Texas Instruments TI-83 Plus Silver...

1 Answer

I need to find out how to graph fuctions and the derivatives using a cfx 9850gc plus ASAP


Hello,
Let us start wih the derivatives. To obtain the values of derivatives at points on a graph, you must set Derivative to ON
Press [AC/On] to trun calculator on. If you do not see the icons press [MENU], with arrows select [RUN] and press[EXE] . The screen clears.
Press [SHIFT][SETUP ] . The first few options must be set as follows
Mode : : Comp
Function Type : Y=
Draw Type : PLot
Derivative : ON This is the one to make derivatives visible
Angle : Rad unles you have to use degrees.
Coord : on if you want the x,y coordinates to be displayed
Grid : Off
Axes : ON to display x and y axes
Press [EXE] to save options. You are taken to [Run] screen.
Press [Menu] Play with arrows to select [GRAPH] and press [EXE]

You see a list Y1=, Y2= and so on
On the line Y1=, enter [SIN] [X,Theta, T] .
If function is complicated you may have to enter parentheses sin(X). When you finish to enter the functions you want to draw, hit [F6:Draw]
The graphs are displayed.
Press [F1:Trace] The trace function allows you to move cursor along the curve, while it displays the coordinates of the cursor. And since you set Derivative to ON, the trace displays also the value of the derivative of the curve at the position of the cursor.

There are other intersting tools, under [Sketch] and [G-solve ] such as minimum, maximum, tangente, inverse of the function drawn, integral under the curve, intercepts with the coordinates axes, etc. I will not spoil your fun by giving you the plot of the movie.

Hope it helps.

Mar 27, 2009 | Casio CFX-9850G Plus Calculator

1 Answer

I can't find how to graph absolute value function.


Hello,
Here how you do it taking as exemples y1=x^3 -5 and y2=abs(x^3-5)
Turn calculator ON by pressing [AC/On] . Use arrows to select [Graph] icon and press [EXE]
On line Y1= enter X[^]3 -5 [EXE]
On line Y2= press [OPTN] [F5:NUM][F1:abs] [(] X [^]3 -5 [)] [EXE]
The graphs will be drawn one after the other. You might have to adjust the window limits.
Here is an ouput drawn on another calculator.
09b72b9.jpg
For negative values of the x-variable, Y1 has negative values, while in the same range, Y2 has positive values, equal and opposite to those of Y1. In that range, Y1 and Y2 are symetric of each other with respect to the X axis.
For positive values of the x-variable, Y1 and Y2 are identical.

Hope it helps

Jan 30, 2009 | Casio CFX-9850G Plus Calculator

1 Answer

HELP!!


Arrow to the left of the Y= until you have highlighted the triangle, and press enter until you see what you are looking for. The triangle you are referring to is probably to graph an inequality and I think you are looking for a regular line.

Jan 28, 2008 | Texas Instruments TI-84 Plus Calculator

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