Question about Texas Instruments TI-84 Plus Calculator

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The X-Values in the Table for a graph wont reset, i have deleted the equation and there is no graph plotted, however they wont disappear. Also, i tried accessing the X on the top of the table, and it did not go up and select it.

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What are you trying to do? You drew a graph, then you cleared the function graphed and went to the table to see if the X values have disappeared and they did not.Right?

By pressing the [SHIFT][(TABLE) key you were in fact commanding the calculator to generate a table for a function but you did not supply (nothing in Y= editor), and the calculator faithfully obeyed you. It looked at the Xmin of the window, looked at the Xscl factor and generated a blank table that contains all the X-Coordinates (where your function or table would have been calculated had you entered a valid expression in the Y= editor). That is how it works.

Posted on Aug 29, 2010

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1 Answer

Invalid dim


You're probably trying to graph a function that does not involve stat plot features. You can correct this by turning off the stat plot features. Press "2ND" "STAT PLOT" and then select 4:PlotsOff.

Oct 03, 2013 | Texas Instruments TI-84 Plus Calculator

1 Answer

Ti 84 plus silver edition will not fit a linear model to plotted points. when I use the function vars>stat>EQ>RegEQ it transmits incomplete data in to Y=.


Your data must be in two lists L1 (for x-values), and L2 (for y-values). This is the default setting. Open the STAT utility, go to the regression models. Select your model then press ENTER. The command echoes on the main screen. For example let the regression be something called LinReg.
On the main screen you see LinReg
Complete the command line as follows
LinReg L1, L2, Y1, ENTER
You see the statistics including the regression equation.
If you go to Y= Editor you will see that Y1 contains the regression equation.
If you have already drawn the scatter plot for your data, pressing GRAPH will superpose the scatter plot and the regression curve., and you will be able to judge the goodness of the fit.

Sep 28, 2013 | Texas Instruments TI-84 Plus Silver...

1 Answer

So on my graphing calculator i put my equation x^3-x^2-10x-8. then i hit graph and it says err:invalid DIM.


INVALID DIM error message may occur if you are trying to graph a function that does not involve the stat plot features. The error can be corrected by turning off the stat plots. To turn the stat plots off, press 2nd then stat plot, and then select 4:PlotsOff. By the way it is easy to graphing function y=x^3-x^2-10x-8.
See captured images: full graph and detail of the left side max


3_4_2012_7_04_47_am.jpg

3_4_2012_7_07_14_am.jpg

As you can see this function have zero values in the points -2, -1 and 4

Mar 04, 2012 | Texas Instruments TI-84 Plus Silver...

1 Answer

How to graph equations


The TI-30XA is not a graphical calculator. You can use it to calculate the function at different values of the argument and then plot the points on a sheet of graph paper, but you're not going to see a graph on its screen.

Sep 20, 2010 | Texas Instruments TI-30XA Calculator

2 Answers

How do I clear things left in the stat plot window?


To clean the slate so to speak, just reset the RAM.
  1. Press [2nd][+] to access the (MEM)ory management function
  2. Press [7:Reset]
  3. Press [1:All Ram]
  4. Press [2:Reset]
  5. Press [CLEAR] to erase the "RAM cleared" Message

Calc

Aug 02, 2010 | Texas Instruments TI-83 Plus Calculator

3 Answers

Fibonacci formula won't graph, but will show table


Fibonacci sequence is the series of numbers 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, ...
At first type Fibonacci equation in Y editor with condition x>=0 and then graphing it. See captured images with enlarged form of graph

7_31_2012_12_55_37_pm.jpg


7_31_2012_12_57_51_pm.jpg


7_31_2012_12_58_57_pm.jpg

Apr 11, 2010 | Texas Instruments TI-84 Plus Silver...

1 Answer

Polynomial function


Hi there,

Say you have an equation x = 2y.

On a graph, you plot the points representing the values that fit into the equation.

X Y
2 1
4 2
6 3
etc.

And to throw a curve in there:
X Y
-2 -1
-4 -2
-6 -3

If have further questions repost, I'll be around for a while.

Hope it helps
Mike

Nov 24, 2009 | The Learning Company Achieve! Math &...

1 Answer

Help me please


Hello,
Sorry if you already know that, but I want to make sure we understand one another.

Say you want to graph the function Y1=2X+3.
You press [MODE] to make sure that the FUNC on 4th line is highlighted permanently. If it is you press [Y=]

On the first line where it says Y1= you enter 2*[X,T,Theta,n] +3.
The X is accessed with the key to the right of the [ALPHA] key.
As you key in your function, notice that the equal sign after Y1 is highlighted and remains so. When you finish entering the function press [ENTER] so that the cursor moves to the line Y2=. Make sure that the = sign after the Y1 in previous equation remains highlighted.

You can now draw the graph by pressing [GRAPH] or generate the table Y1=f(X) by pressing [2nd][TABLE]. Under no conditions should you enter YOUR own values. If the table does not appear there may be a problem, and you will not solve it by entering values.

Now let us try to get you calculator to work as it should.

Press [2nd][STATPLOT][4:PlotsOff] , the command PlotsOff echoes on main screen. Press [ENTER] to turn statistical plots OFF. Screen displays Done.
Press [2nd][CATALOG] [ENTER]. The list of all avilable command appears. Scroll down till you reach ClrAllLists. Move arrow to the correspondig line and press [ENTER] , command echoes on main screen as ClrAllLists. Press [ENTER] to erase all old statistical lists that may be stored in the calculator memory.

Now you are ready to graph or create the table of values. Press [2nd][Table] and the table should be displayed. All you can do with the values in the table is to look at them, examine them. You cannot modifie nor erase them.

If, for reasons of your own, you think you ought to be allowed to enter YOUR values, in the table, then this is not graphing functions. The name for that is DOING STATISTICS. And the procedure is tottaly different: You enter YOUR values in lists and use the calculator to draw the data points, and to find the best fit (the curve that models the pattern of data distribution best). When you decide which fit is the best, you can use the calculator to extract the equation for the curve and, if you want it, to draw the curve on the same graph where you raw data is represented.
Hope these clarifications helps.





Before jumpin

Oct 07, 2009 | Texas Instruments TI-84 Plus Calculator

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...

1 Answer

Graph and trace buttons don't work


If either error occurs when trying to graph a function (not a STAT PLOT), the error can be corrected by turning off the STAT PLOTS. The following steps will turn the STAT PLOTS off, allowing the graph of the function to be displayed.• Press [2nd] [Y=] to access the STAT PLOTS menu.
• Select 4: PlotsOff.
• Press [ENTER].
• Try graphing a function like y = x^4-3x^3+6x-1

06-03-2017 image001-sswjakinw4t03fuerzdthsg3-1-0.jpg

Jun 03, 2017 | Texas Instruments TI-84 Plus Calculator

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