Texas Instruments TI-84 Plus Calculator Logo
Posted on Apr 19, 2010
Answered by a Fixya Expert

Trustworthy Expert Solutions

At Fixya.com, our trusted experts are meticulously vetted and possess extensive experience in their respective fields. Backed by a community of knowledgeable professionals, our platform ensures that the solutions provided are thoroughly researched and validated.

View Our Top Experts

How do I use the intersect function on the TI-84 plus calculator

1 Answer

k24674

Level 3:

An expert who has achieved level 3 by getting 1000 points

Superstar:

An expert that got 20 achievements.

All-Star:

An expert that got 10 achievements.

MVP:

An expert that got 5 achievements.

  • Texas Instru... Master 8,093 Answers
  • Posted on Apr 19, 2010
k24674
Texas Instru... Master
Level 3:

An expert who has achieved level 3 by getting 1000 points

Superstar:

An expert that got 20 achievements.

All-Star:

An expert that got 10 achievements.

MVP:

An expert that got 5 achievements.

Joined: Aug 17, 2009
Answers
8093
Questions
0
Helped
4672432
Points
21595

  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.

  • k24674 Apr 24, 2010

    Here are some screen captures












×

5 Related Answers

Anonymous

  • 1 Answer
  • Posted on Jun 07, 2009

SOURCE: antilog for ti-84 plus silver edition calculator

"2nd" + "log"

Ad

Anonymous

  • 1 Answer
  • Posted on Jan 04, 2008

SOURCE: graphing trig functions

Put the calculator in radian mode and it will graph trig functions just fine. If you don't know how to change it to radians, then go to mode and cursor over to select radians. I am assuming you know where the sine, cosine, tangent, etc. keys are.

Anonymous

  • 21 Answers
  • Posted on Mar 02, 2009

SOURCE: TI-84 Plus Calculator will not turn on, says ram is cleared

Thats because the OS is corrupt. Follow the manual and reload the OS, try the 2.43 OS

Anonymous

  • 1 Answer
  • Posted on Jun 30, 2009

SOURCE: 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!

k24674

  • 8093 Answers
  • Posted on Nov 10, 2009

SOURCE: TI 84 plus calculator refuses to graph more than one function

Hello,
Please, read the following, even if you already know some of its contents.

  1. Once you enter an equation, the corresponding equal sign is highlighted by default.
  2. Before you draw the 2 graphs, move the cursor to Y3 or Y4 and verify that the = signs for Y1 and Y2 remain highlighted.
  3. If one is not highlighted, move the cursor on it and press ENTER.
  4. If you still have problem, press [2nd][STATPLOTS][4: PlotsOff] [ENTER].
  5. Command PlotsOff echoes on main screen.
  6. Press [ENTER], screen displays Done.
  7. Restart the graphing procedure.
  8. If all else fails, just reset the RAM by pressing [2nd][MEM][7:Reset][1:All RAM][2:Reset], press [CLEAR] to clear the message.
You should make it a habit to clear the RAM every time you start a new type of problem.

Hope it helps.

Ad

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1helpful
2answers

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
LOG ALPHA [X] ) + LOG ALPHA [X] + 3 )
On the Y2 line enter the expression 7-X by pressing
7 - ALPHA [X]
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.
0helpful
1answer

How to use ti 84 plus calculator to graph linear equations

You have to use Y Editor to define functions on the both sides of the equation and then graph it. Finally option is F5: Intersection.
See captured images for equation 5x+10=-2x-7, y1=5x+10, y2=-2x-7 and x=-17/7












2_26_2012_7_15_54_am.jpg

2_26_2012_7_16_12_am.jpg
0helpful
1answer

When I graph system of linear equations and try to find an intersection point it says no sign change why?

The solve( function was not able to find the intersection point because it lies outside the graph range. The window dimensions are too narrow to contain that point. I suggest you restrict the graph to the quadrant where you suspect the solution to be (example first quadrant if appropriate) : take Xmin=0, Ymin =0 and choose Xmax and Ymax large enough to enclose the intersection point.
0helpful
1answer

WHen I use my intersect function to find intersection points, it asks "first curve" then "second curve" and it wont say anything after that. It just repeats "second curve" continuously. PLEASE HELP!

the curve is refering to the function. So you have two different "lines". You choose intersect then one line, then it will ask for the other line, then a guess. your guess may or may not matter if there is only 1 intersection it will only calculate faster. If there is more than one intersection it will let you choose which one you want.

Basically you can graph 1,2,3,4,5 or how ever many lines it will take, but you may only want the intersect of 2 of them, thats why it asks.

hope this helps
0helpful
1answer

My TI 84 Plus Caluclator

Hello,
The function Intersect from the CALCULATE menu finf the coordinates of a point at which two or more curves intersect.
To use it:
1. Draw the functions.
7036100.jpg
2. Press [2nd][CALC][5:Intersect]

4c21f92.jpg

The cursor is on one of the curves. Read the equation top of the screen. If it is one of the curves you want press [ENTER]. The cursor jumps to another curve (in this case the only other curve).
f75e725.jpg
Read the equation on top of the screen to verify thst it is the correct one. Press [ENTER]. The calculator asks asks for a guess of the coordinates of the intersection point.
ee9cd29.jpg

As the intersection point is to the left of the current cursor position, use the left arrow to move cursor closer to the point.

d22f78b.jpg
Press [ENTER], and wait for the solution. Here it is.
2b043d0.jpg

In your question you talk about y intercept. If you want to calculate the ordinate of the point where a curve intersects the Y-axis, it is more efficient to use the [2nd][CAL][1:Value] selection.
0a11a73.jpg
You enter X=0 and press [ENTER]. The cursor jumps on the first curve (Y1=) an gives you the y-intercept.
7420d8f.jpg
Notice the position of cursor on graph. The y-value at the bottom is its ordinate.
To get the y-intercept of the second curve, leave the cursor on y axis and press the DownArrow. Cursor jumps to tthe second curve.
Since the X=0 is still stored, the value of y is displayed directly.

b14da69.jpg

Hope it helps.

0helpful
1answer

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!
0helpful
1answer

Could you help me

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.
2helpful
1answer

Error :invalid DIM

This is my first post on this site, but I've had friends at school ask me about this. Apparently I'm like a calculator genius or something...

One solution I know of is clearing the RAM. Sounds strange, doesn't it? But it fixed three different calcs.

Be sure to back up or archive important data before doing this.
Not finding what you are looking for?

4,389 views

Ask a Question

Usually answered in minutes!

Top Texas Instruments Office Equipment & Supplies Experts

k24674

Level 3 Expert

8093 Answers

Jerry Naidoo

Level 2 Expert

152 Answers

Paul Bade

Level 3 Expert

1818 Answers

Are you a Texas Instruments Office Equipment and Supply Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...