Question about Texas Instruments TI-84 Plus Calculator

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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.

Posted on Feb 04, 2008

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Posted on Jan 02, 2017

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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).

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).

Apr 15, 2014 | Texas Instruments TI-84 Plus Silver...

You can't simply enter 7x+9=30 into the calculator, there is a way to calculate what the x is but its been a few years since I've done these..

Oct 03, 2008 | Texas Instruments TI-83 Plus Calculator

You can download the Application Plysmlt2 from education.ti.com and use TIConnect to transfer it to the calculator.

Here are three screen captures to show you what it can do.

Hope it answers your question.

Here are three screen captures to show you what it can do.

Hope it answers your question.

Dec 09, 2011 | Texas Instruments TI-84 Plus Calculator

After you enter the data draw the SCATTER plot first.

When you perform the (linear) regression analysis LineReg, save the regression equation to a function, for example Y1

The syntax is

LineReg L1, L2, Y1 ENTER

From the Stat>CALC menu press LineReg

The command echoes on command line

Press [2nd][1] to enter the L1 list on command line

Press [,] to separate

Press [2nd] [2] to enter L2 on the command line

Press [,] the comma again

Press [VARS][>][Y-Vars][1~Function][1:Y1] [ENTER]

Press [GRAPH] to have the regression line equation drawn

on the same screen as the Scatter Plot you drew before.

When you perform the (linear) regression analysis LineReg, save the regression equation to a function, for example Y1

The syntax is

LineReg L1, L2, Y1 ENTER

From the Stat>CALC menu press LineReg

The command echoes on command line

Press [2nd][1] to enter the L1 list on command line

Press [,] to separate

Press [2nd] [2] to enter L2 on the command line

Press [,] the comma again

Press [VARS][>][Y-Vars][1~Function][1:Y1] [ENTER]

Press [GRAPH] to have the regression line equation drawn

on the same screen as the Scatter Plot you drew before.

Sep 13, 2011 | Texas Instruments TI-84 Plus Calculator

Assuming you want the solution graphically.

You press the Y= button (top left)

Enter the first side of the equation after Y1=

Press the down arrow

Enter the other side of the equation after Y2=

Set the setting by pressing the window button (set xmin to -10; xmax to 10; ymin to -10; ymax to 10 )

Press the graph button

You will see now the two functions potted.

Now press Calc ( 2nd and after that Trace)

Select the correspondant number for intersect.

Set min to -10

Press enter

Set max to 10

Press enter

Guess something between -10 and 10 (eg. 0)

The answer will come out quickly (x=-3,5)

Hope it helps.

You press the Y= button (top left)

Enter the first side of the equation after Y1=

Press the down arrow

Enter the other side of the equation after Y2=

Set the setting by pressing the window button (set xmin to -10; xmax to 10; ymin to -10; ymax to 10 )

Press the graph button

You will see now the two functions potted.

Now press Calc ( 2nd and after that Trace)

Select the correspondant number for intersect.

Set min to -10

Press enter

Set max to 10

Press enter

Guess something between -10 and 10 (eg. 0)

The answer will come out quickly (x=-3,5)

Hope it helps.

Mar 15, 2011 | Texas Instruments TI-84 Plus Calculator

You can move the cursor back to the center of the graph.

You can also press [ZOOM][6:ZStandard] and the graph will be centered on (0,0).

You can also press [ZOOM][6:ZStandard] and the graph will be centered on (0,0).

Mar 03, 2010 | Texas Instruments TI-84 Plus Silver...

I am afraid you cannot use the TI8xPlus family of calculators to solve linear systems in matrix form. In this calculator, matrices must have real coefficients.

You can however separate (expand) the problem into a linear system of 4 equations in 4 unknowns and try to solve it with the calculator.

If I did not make mistakes during the expansions and the gathering of terms you should get the following equation

-(8a+8c+10d) +i*(-8b+10c-8d) =0+i*0 from which you extract an equation for the real parts, -(8a+8c+10d)=0 and another for the imaginagy parts i*(-8b+10c-8d) =i*0

If I did not make mistakes (you should be able to find them, if any) your system of two linear equations with complex coefficents has been converted to a system of 4 linear equations with real coefficients.

8a-15b-8c=10

15a+8b-8d=0

8a+8c+10d=0

-8b+10c-8d =0

Now, you can in theory solve this system with help of the calculator, to find a, b, c, and d. When these are found, you can reconstruct the X and Y solutions.

Now get to work: Ascertain that my extracted equations are correct, then solve for a, b,c, and d, and reconstruct X and Y.

I am no seer, but my hunch is that this system is degenarate. I will not explain what that means.

You can however separate (expand) the problem into a linear system of 4 equations in 4 unknowns and try to solve it with the calculator.

- define X = a+i*b
- Define Y=c+i*d
- Rewrite the first equation substituting a+i*b for X and c+i*d for y.
- Gather all real terms together, and all imaginary terms together on the left.
- You will have (8a-15b-8c) +i(15a+8b-8d) = 10 +0i
- This equation can be split into two equations by saying that

- the real part pf the left member is equal to the real part of the right member, this gives 8a-15b-8c=10, and
- the imaginary part of the left member is equal to the imaginary part of the right member, this gives 15a+8b-8d=0

If I did not make mistakes during the expansions and the gathering of terms you should get the following equation

-(8a+8c+10d) +i*(-8b+10c-8d) =0+i*0 from which you extract an equation for the real parts, -(8a+8c+10d)=0 and another for the imaginagy parts i*(-8b+10c-8d) =i*0

If I did not make mistakes (you should be able to find them, if any) your system of two linear equations with complex coefficents has been converted to a system of 4 linear equations with real coefficients.

8a-15b-8c=10

15a+8b-8d=0

8a+8c+10d=0

-8b+10c-8d =0

Now, you can in theory solve this system with help of the calculator, to find a, b, c, and d. When these are found, you can reconstruct the X and Y solutions.

Now get to work: Ascertain that my extracted equations are correct, then solve for a, b,c, and d, and reconstruct X and Y.

I am no seer, but my hunch is that this system is degenarate. I will not explain what that means.

Feb 10, 2010 | Texas Instruments TI-84 Plus Calculator

Hello,

Some old configuration settings, or old variables are spoiling your fun. Clear the RAM and start again.

Hope it helps.

Some old configuration settings, or old variables are spoiling your fun. Clear the RAM and start again.

Hope it helps.

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

Hello,

To solve Ohm's law you need no sophisticated calculator. If you know two quantities, you readily calculate the third. Application of Kirchhoff's (two h) laws to linear circuits, gives you a linear system of equations. If a calculator can solve linear systems, or handles matrices, the limitations would pertain to the maximum dimension of the matrices.

I just tried the TI83 to define a 45x45 square matrix and a 55x45 matrix. The maximum number of rows or columns is 99. But it will depend on memory.

If you have the TI84PLUS Silver Edition it should be fine. You can upgrade to a TI 89 Platinum, which can handle symbolic calculations (with undefined coefficients a, b, c).

Hope it helps.

To solve Ohm's law you need no sophisticated calculator. If you know two quantities, you readily calculate the third. Application of Kirchhoff's (two h) laws to linear circuits, gives you a linear system of equations. If a calculator can solve linear systems, or handles matrices, the limitations would pertain to the maximum dimension of the matrices.

I just tried the TI83 to define a 45x45 square matrix and a 55x45 matrix. The maximum number of rows or columns is 99. But it will depend on memory.

If you have the TI84PLUS Silver Edition it should be fine. You can upgrade to a TI 89 Platinum, which can handle symbolic calculations (with undefined coefficients a, b, c).

Hope it helps.

Sep 17, 2009 | Texas Instruments TI-84 Plus Silver...

make sure your stat plots are off. you can just reset your calc. second + 7 1 2. or you can hit second y= and make sure that the stat plots are off. have any more questions. just send me a another request.

Jul 17, 2008 | Texas Instruments TI-84 Plus Silver...

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