Question about Texas Instruments TI-Nspire Graphic Calculator

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HELP WITH TI INSPIRE CX calculator

When I graph two graphs and then find the intersects the coordinates of the intersects are always rounded up. like, the x value for one of the coordinates was 2.15 but it gave me 2.2 but i needed to see 2.15. how can i get it to leave about 4 numbers behind the decimal?I tried messing with the floats for graph and geometry... doesnt work. I've got a finals pretty soon please help.

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  • k24674 Apr 27, 2013

    Sorry, the pictures have dsiplaced the text. The beginning of some sentences is at the right of the pictures.

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Draw the graphs of the functions you are interested in. While the graphs are displayed Press the Menu key. In the drop down window locate the submenu Settings (number 8 or 9) depending on your calculator
HELP WITH TI INSPIRE CX calculator - 6d8395f7-b10e-4d9e-a7e6-45beadb303a3.jpgThe following screen is displayed with at the top the setting Float.
eb304039-5513-442e-886f-d435de8aa653.jpgFollow the right pointing arrow on the same line as float and select Float 3 or 4 as on the screeHELP WITH TI INSPIRE CX calculator - 0c4e79fb-d2eb-4461-821f-87adbd63b387.jpgixya.net/uploads/images/0c4e79fb-d2eb-4461-821f-87adbd63b387.jpg" alt="0c4e79fb-d2eb-4461-821f-87adbd63b387.jpg" class="h_mi" />Point to the graph of one of the functions select it then press the menu select option Analyze graph then intersection. You will be asked to select the second function, then the lower bound and upper bound. As you see on the previous screen capture, the coordinates of thHELP WITH TI INSPIRE CX calculator - 3acdb05f-f573-4e5e-a467-03db35a80ea2.jpgcimal digits.
3acdb05f-f573-4e5e-a467-03db35a80ea2.jpg

Posted on Apr 27, 2013

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SOURCE: 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.

Posted on Sep 22, 2008

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SOURCE: Calculator won't graph

You have either entered data in lists where one list is longer than the other or in your y= screen, one of the plots is turned on. If a plot is turned on the letters are in white surrounded by a black box. To turn off the plots, higlight the plot that is on and press enter.

Another fast solution is to press, 2nd the the plus sign then the numbers 7 then 1 then 2. It will restore factory settings.

Posted on Aug 06, 2009

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SOURCE: Says error when trying to graph.

From a lack of a response I'm assuming this is no longer a problem. If it is still a problem, please post a comment specifying the error message.

Posted on Mar 20, 2010

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SOURCE: Please help plotting graphs on TI-83 plus

I believe I already showed you with a profusion of details how to graph functions on the calculator. It would very kind of you to refer to the post that answered your question, so as not to make us answer it all over again. Much appreciated.

Read the following to use the intersection function.

  1. You draw two or more graphs.
  2. After the graphs are displayed, press [2nd][TRACE] to access the (CALC)ulate menu.
  3. Select [5:Interesct]
  4. You will be prompted for a first curve: the equation of the curve will be displayed at the top left corner of the screen. If it is one the intersecting curves, press [ENTER]
  5. You will be prompted for the second curve. (You can move from one curve to another by pressing the UpArrow or DownArrow).
  6. After two curves are selected, you will be prompted for a guess for the X-value of an intersection point: you can use the keypad to enter a guess or use the left or right arrow to move the cursor towards a point of your choosing (if there are more than one point).
  7. After a short while the calculator gives you a solution.
  8. If it fails, you must make a better guess.

Here are some screen captures
fc28ff0.jpg507240a.jpg

4f2f995.jpgb8716cd.jpg

dcff79a.jpgc08d5a0.jpg

7aaeb44.jpg730dd00.jpg

1168872.jpg

Posted on May 16, 2010

Testimonial: "Thank you so much for answering this and my previous one, it is really very kind of you.I am sorry for being so stupid with the calculator. I can work this out manually but can never manage to get the right information on the calculator despite using a book called Tapping in Mathematics. Thanks to your very clear explaination, it seems so easy now. "

oneplusgh
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SOURCE: I have a TI - 86 graphing calculator. I need to

Press the [2nd] key and then, press and hold [up arrow] key. Keep repeating the process until desired darkness.

Posted on Jan 06, 2011

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1 Answer

Help with Ti Inspire Cx calculator. It rounds up the coordinates when graphing


Draw the graphs of the functions you are interested in. While the graphs are displayed Press the Menu key. In the drop down window locate the sub menu Settings (number 8 or 9) depending on your calculator
The following screen is displayed with at the top the setting Float.

576eff6a-ca6c-4471-b934-fb86513193cf.jpg



6bb5d17f-69df-4ff9-9780-ed0a7be1d0aa.jpg
Follow the right pointing arrow on the same line as float and select Float 3 or 4 as on the screen capture that follows
ce766af9-0700-4826-b12a-0c98a9589a60.jpg

Point to the graph of one of the functions select it then press the menu select option Analyze graph then intersection.
979a4029-a5d4-484c-be0e-673f4e970f98.jpg


5795e6cf-b7be-4779-9e0c-f9439e1a6580.jpg

You will be asked to select the second function, then the lower bound and upper bound. As you see on the previous screen capture, the coordinates of the intersection point are given with 3 decimal digits.

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Log(x+2)+log(x+3)=7-x How to intersect with TI-84


Press Y=
On the Y1 line enter the expression LOG(X+2)+LOG(X+3) by pressing
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On the Y2 line enter the expression 7-X by pressing
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Press GRAPH to see the graph. To see where they intersect, press 2ND [CALC] 5. See "First curve?" in the lower left. Use up/down-arrow to select one of the two curves and press ENTER. See "Second curve?" in the lower left. Use up/down-arrow to select the other curve and press ENTER. See "Guess?" in the lower left. Press ENTER. The calculator will show the coordinates of the intersection.

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How to set a ti-84 to graph both sides of the equation separately on the same coordinate system.


If I'm understanding you correctly, you want to graph something like

5x+3=9

If this is correct, graph 5x+3 in the y1 line and 9 in the y2 line. To find the solution, you will press 2nd, then trace the intersection and hit enter 3 times. This will get the solution you need for the equation.

If this is not what you are wanting to do, you need to be try again and elaborate more.

Jun 28, 2011 | Texas Instruments TI-84 Plus Calculator

1 Answer

I have a TI-Nspire Graphic Calculator (Not the CAS.) I had a couple of questions about the calculator. First off, how do I limit the domain on a function that I am graphing. For example, I am graphing y=x...


simply divide the function by the domain you wish.

In your example, you wanted to graph y=x for x>=0.
You should graph the function f1=(x)/(x>0)

To find out when y=900, graph the function in f1, and then graph the equation y=900 (which will be a horizontal line) and use the intersect function to find where they cross. The x-coordinate of the intersection is the solution you are seeking.

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1 Answer

Please help plotting graphs on TI-83 plus


I believe I already showed you with a profusion of details how to graph functions on the calculator. It would very kind of you to refer to the post that answered your question, so as not to make us answer it all over again. Much appreciated.

Read the following to use the intersection function.
  1. You draw two or more graphs.
  2. After the graphs are displayed, press [2nd][TRACE] to access the (CALC)ulate menu.
  3. Select [5:Interesct]
  4. You will be prompted for a first curve: the equation of the curve will be displayed at the top left corner of the screen. If it is one the intersecting curves, press [ENTER]
  5. You will be prompted for the second curve. (You can move from one curve to another by pressing the UpArrow or DownArrow).
  6. After two curves are selected, you will be prompted for a guess for the X-value of an intersection point: you can use the keypad to enter a guess or use the left or right arrow to move the cursor towards a point of your choosing (if there are more than one point).
  7. After a short while the calculator gives you a solution.
  8. If it fails, you must make a better guess.

Here are some screen captures
fc28ff0.jpg507240a.jpg

4f2f995.jpgb8716cd.jpg

dcff79a.jpgc08d5a0.jpg

7aaeb44.jpg730dd00.jpg

1168872.jpg

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How do i solve this problem 3x+25=5x using my TI 84 plus


i think there are programs but with something as simple as that you should be able to work it out manually....
3x+25-5x=5x-5x
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x=25/2 or 12.5

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1 Answer

Ti 84 plus problem


The calculator only displays from -10 to 10 on the x and y axes, and both of your lines are outside of that range. However, it is easy to change that.

1. Hit the gray "WINDOW" button that is directly under the screen
2. Change "Xmax" to 150
3. Change "Ymax" to 200

Remember to change both of those values back to 10 when you are done with this problem!

Here's how to graph it:
1. Hit the "Y=" button
2. Enter your first equation after Y1, and your second equation after Y2
3. Look over both the equations to make sure you typed them correctly
4. Hit the "GRAPH" button
5. If you don't see the intersection you will need to adjust Xmax and Ymax again
6. Hit Hit "2ND" and the "TRACE" to bring up the "CALC" menu
7. Scroll down to "intersect" and hit enter
8. Hit enter 3 times (You use the first and second curve options when you have more than 2 lines)
9. It should display the coordinates at the bottom
10. I got (76, 142.1) for the intersection

Thanks for asking this question! I used to do this a much harder way, but while I was calculating the answer to your question I hit a wrong button and accidentally found this method!

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