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

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I need to enter two columns of,values, x and y, to determine the linear equation but my table,only,displays the x column. How do,I get the y column back to enter numbers in?

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Use the STAT function
Press STAT>EDIT >1:EDIT
Enter independent x_variable in L1, and y-variable in L2
To do calculations, Look under CALC (see 3rd screen capture).

I need to enter two columns of,values, x and y,  t - 950b71d3-25e1-4a5b-b0b4-d4d0e82c0d11.png 90b5ca2a-98e9-4ccc-9052-249dc893a0ae.png

Posted on Sep 02, 2014

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1 Answer

Solving linear equations in 3 variables by matrix method in casio fx-115ES


Press key Mode, first select option 5:EQN (by pressing key 5), then option 2: a_nX+b_nY+c_nZ=d_n (by pressin 2).
Now input coefficients from equations in table (each column is for one variable), just type in number and press =, then use arrows to move to another cell.

Sep 02, 2011 | Casio FX-115ES Scientific Calculator

1 Answer

I have a TI 84 plus and when I hit second graph it goes to table where I can insert y values. by accident erased my Y values and only have the x column. Can I get the Y values back?


If you have a function that generated the table, you can recreate both columns again. Just enter the function, then press SHIFT GRAPH. The table will be regenerated.
For values you entered yourself there is no way to recover them. You will have to reenter them again.

Sep 02, 2011 | Texas Instruments TI-84 Plus Calculator

1 Answer

Am trying to calculate corelation on a Casio fx-9750GII,


Press Menu.
Use arrows to highlight STAT icon and press EXE.
Enter your data in two lists (x-values in L1, Y-values in L2)
Press F2 to activate the CALC Tab at the bottom of screen.

8_1_2011_10_31_34_am.jpg
This is what you see.

8_1_2011_10_35_06_am.jpg
Press F3 to activate the REGression tab.
This is what you will see: the TABs at the bottom of screen.
Each tab corresponds to a regression model: X-linear, X2 quadratic, etc.
8_1_2011_10_38_52_am.jpg
If you press F3:X^2, you get the following
8_1_2011_10_36_07_am.jpg
You see the parameters of the regression equation, the coefficient of determination r^2, and the Mean Square error. No correlation coefficient is defined for this regression model.
For other models like linear, logarithmic, power and exponential regressions, the correlation coefficient is defined and is thus displayed with the regression equation. It is the r-value.

8_1_2011_10_44_16_am.jpg

Jul 31, 2011 | Casio FX-9750GPlus Calculator

1 Answer

How to do equations the papers that come with it doesn't explain it very well. Is there someplace where I can get a better explaination?


You can solve equations two ways: The EQN computational mode or the SOLVE application.
IN the EQN mode you can solve linear equations in one, two and three unknowns; the quadratic equation; and the cubic equation.
Enter the EQN mode by following the instructions on the following screen capture. Press 5:EQN
6_25_2011_1_06_32_pm.jpg
You have three types of equations.
6_25_2011_1_08_15_pm.jpg
Once you select the type of equations, a template is displayed where you enter the relevant coefficients.

6_25_2011_1_10_10_pm.jpg
Under each label (a, b, etc. ) enter a coefficient and press ENTER to move to the next. With a cubic equation, or a linear equation in 3 unknowns, you have to use the Right arrow to display the cells where you enter the value of d.
After you input all necessary coefficients press the = sign to get the solution.

To use the SOLVE feature, see the screen capture that follows. It comes from the Casio manual.



6_25_2011_1_17_45_pm.jpg

6_25_2011_1_19_53_pm.jpg
Good luck

Jun 24, 2011 | Casio FX-115ES Scientific Calculator

1 Answer

How to find rank of matrix using casio991 es??


The FX-991ES offers simple matrix operations like basic arithmetic, plus the slightly more complex operations determinant and inversion. Furthermore, it is limited to matrices with a maximum size of three rows and three columns.

The rank of a matrix is defined as the number of linearly independent row or column vectors. You can perform a simple partial test for square matrices by calculating the determinant of the matrix:
  1. Enter the matrix into matrix variable MatA.
  2. Press [SHIFT] [4] [7] [SHIFT] [4] [3] [)] [=]
The display now should show det(MatA) and the determinant of the matrix in the result. If the determinant is not 0, the rank of the matrix equals the dimension of the matrix, otherwise the rank is less than the dimension.

Unfortunately, this is all support the calculator offers. For small matrices (i.e. 4x4 or smaller), you should familiarize yourself with the Gau? Elimination Method algorithm for solving linear equation systems. It is a two-step procedure where a matrix first is converted to its row echelon form, and second to row canonical form to solve the LES.
You need to follow the algorithm only through the first part, the number of non-zero rows after this step equals the rank of the matrix. With a little exercise you will be able to do it faster on paper than trying to do it with your calculator only.

For larger matrices I suggest to use a PC with more powerful math software (Maple, Mathematica, ...) or, if you know some basic computer programming, just write the necessary program yourself, which is also a very good exercise both in programming and understanding the algorithm.

Jan 16, 2011 | Casio FX-115ES Scientific Calculator

1 Answer

I want to enter in numbers for L1 and L2, but when I go the TABLE there is no L1 or L2 column, only X, and there are numbers entered in the X column that I want to delete. How do I clear the X values,...


The table is where the calculator displays values from functions entered in the Y= page. To enter numbers into lists, press STAT and select Edit to get into the list editor.

Dec 21, 2010 | Texas Instruments TI-84 Plus Calculator

1 Answer

How to solve matices as in finding the values to


I assume you want to solve a linear system of three equations i three unknowns (x,y,z).

  1. Turn calculator ON.
  2. If you do not see icons, press [MENU] key.
  3. Use arrows to move focus to [EQUA] and press [EXE]
  4. In new screen select F1: Simultaneous
  5. Select the numbewr of unknows (in your case 3): Press [F2:3]
  6. A table opens: it has 3 rows and 4 columns
  7. Enter the coefficients in first equation on first line (a1, b1,c1) and the constant term d1.
  8. Enter the other coefficients and the constant terms at the right places, pressing [EXE] after each entry.
  9. When finished coefficients and constant terms, press [F1:Solv]
  10. The solution vector (X,Y,Z) is displayed on next screen.
  11. Note: if the coefficients are integers, it is possible that the solution vector will be displayed as mixed fractions (exact solutions),
  12. If not, the solution vector will be in decimal format.
82a2c0e.jpge69b451.jpgac9ab46.jpg

f79e545.jpg

Mar 02, 2010 | Casio FX-9750GPlus Calculator

1 Answer

How do i perform linear regressions on TI-Nspire Individual Handheld


Start by creating the data lists.

CREATE THE X-LIST
  1. Press Home.
  2. Use navigation pad to Highlight [3: Lists and Spreadsheets]
  3. Press Enter
  4. A list opens with cursor in Cell A1.
  5. Use UpArrow to move the cursor to the header of the list and give it a name, say X.
  6. Press Enter. Cursor moves to Cell A1
  7. Enter an X-value in each cell and press ENTER to move to next cell:
  8. Type 1, and press ENTER. Say Yes to overwrite message by pressing OK.
  9. Enter 2,3,4,5,6,7,8,9,10 (just a bogus sample).
CREATE THE Y-LIST
  1. After typing 10 in cell A10, press ENTER to validate.
  2. Use the Navigation pad to move cursor to the head of the B column.
  3. Give it a name , say Y.
  4. Press ENTER, Cursor moves to cell B1.
  5. As for X-list, enter the Y values. Here is a sample (-2, -1, 0, 1,2,3,4,5,6,7). After you type value in B1, accept the overwrite message by pressing OK. Type the other values.
  6. Make sure that the X-List and Y-List have the same number of elements, otherwise you will have a dimension mismatch error.
DOING A REGRESSION
  1. While the lidt is still displyed, prress the Menu key
  2. Highlight [4:Statistics]
  3. Use Right Arrow to unfold submenu list and select [1:Stat Calculations]
  4. Use right Arrow to unfold the submenu list and
  5. Select [3:Linear regression (mx+b)] or [4:linear regression (ax+b)]
That is what you see.
a8d4376.jpg
Using Tab to move from one line to the next, configure the calculator as seen on the next screen.
25998ef.jpg
And the last line is at the bottom of the next screen capture
db280de.jpg

The statistical results will hence be displayed in the C[] column.
Use TAb to move focus to OK, and press ENTER.
Here they are.
bd6f8f9.jpg

You can recognize each statistical results, RegEq is y=mx+b. You also have m, b, r^2, and r. The residuals appear on the next row. By highlighting the cell with the {0.,0...0} you can display the hidden values
8381923.jpg

Here you have all you asked for. But you can go further by drawing the curve.

The regression equation is stored in function f1, so you have to draw the f1 function. .

DRAWING THE REGRESSION CURVE

Press the HOME button
Highlight and select [2:Graphs and Geometry]
At the bottom of the screen there is a command line with f2(x)=
Use the UpArrow to display the f1(x)= equation
ba8a1a4.jpg

Press ENTER to draw the function f1
fc19833.jpg

I think I have to stop here. There is enough material to get you started.
I left for you the part where you draw the data points. read the user manual.

Jan 28, 2010 | Texas Instruments TI-Nspire Graphic...

1 Answer

Solving simultaneous equation with scientific


Hello,

Let us assume you have two simultaneous linear equations :

a_1*x+ b_1*y+c_1=0
a_2*x +b_2*y+c_2=0


where a_1, a_2, b_1, b_2, c_1,c_2 are coefficients (numerical or algebraic).
The problem is to obtain the particular values of the unknowns x and y for which the two equations are both satisfied: If you substitute the particular values of x and y you find in any of the two equations you discover that both equalities are true.

A small system of equations like the one above can be solved by some very simple algorithms (elimination, substitution, combination) which can be carried out by hand.

The solution of large systems of linear equations can be sought by making use of the concepts of matrices (plural of matrix), determinants, and certain rules called Cramer's rules.

Due to its repetitive nature, the algorithm ( a well defined, limited sequence of steps) is suitable for a calculating machine (computer or calculator).

Certain calculators have, embedded in their ROM, a program that solves linear systems of simultaneous equations. Usually you are asked to enter the values of the coefficients a_1, etc. in a set order, then you press ENTER or EXE (Casio) . If a solution exits (not all linear systems have solutions) the calculator displays it.

Hope that satisfies your curiosity.

Aug 12, 2009 | Sharp EL-531VB Calculator

1 Answer

Lookup,s


If you can move your name column (C) to the first column, you could leverage the VLOOKUP formula pretty easily.
To do this, do the following:
1) Move the C Column to be the A Column, shifting all other columns to the right.
2) (optional) Insert a new row at the top of the sheet (to hold the formula & seach value)
3) Use A1 as your search field.
4) In A2, enter the following formula:
=VLOOKUP($A$1,$A$2:$C$6,3,)

Describing above parameters, in the formula:
$A$1 -> the search field (name your looking for).
$A$2:$C$6 -> The table/grid you wish to search and return values from. The left most column (A) must contain the values to be searched.
3 -> is the column number (A=1,B=2,C=3, etc) within the table/grid to return.

If you cannot make the name column your first (A) column, there are more complex ways to do this. For instance, create a new sheet which redisplays the info in the structure easier for this method, and perform the VLOOKUP on that data. Other options might exist in creating a complex formula that would get you what you want.
Also, if you can sort column A (names) it would find results faster, if your data set is large.

Feb 03, 2008 | Microsoft Excel for PC

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