Question about Texas Instruments TI-83 Plus Calculator

parabola y=x^2-x-6 and line y=2x-2 on the same graph for values between x -5 and 5

I need to find the co-ordinates of the points where the 2 graphs intersect please.
Thanks

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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

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. "

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Posted on Jan 02, 2017

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