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April 24th, 2010, 07:28 AM
 chromiumlid
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How can I find the x value from a given y value on a graph??

Hello!

I'm new to this forum! sorry if i've posted this in the wrong place.

So imagine that I have a graph, and I want to know what the x value is when y = 16.73 , is there a way of doing this.

I can use the CALC and 1:VALUE on the calculator to find the y value of a given x value but now i want to do the reverse.

I've been trying to do TRACE and TABLE functions but the values i get are very rough and i cant get it to exactly 16.73.

THANKYOU !!!!!

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April 24th, 2010, 04:56 PM
 MufinMcFlufin
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Quote:
 Originally Posted by chromiumlid Hello! I'm new to this forum! sorry if i've posted this in the wrong place. So imagine that I have a graph, and I want to know what the x value is when y = 16.73 , is there a way of doing this. I can use the CALC and 1:VALUE on the calculator to find the y value of a given x value but now i want to do the reverse. I've been trying to do TRACE and TABLE functions but the values i get are very rough and i cant get it to exactly 16.73. THANKYOU !!!!!

There is no official method to do such a thing, but I can think of a couple ways you can try to do something like that. First off, you can go to [2nd],[WINDOW] for the Table setup, and from there you can change the counter of which the table uses (ΔTbl) so that you can find 16.73 on the table. Or you can do a more accurate and quicker method, of making a second graph y=16.73. Then going to [CALC],[5. Intersect] and finding where the two graphs intersect.

If you have anymore questions, don't hesitate to ask.

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April 25th, 2010, 04:40 AM
 chromiumlid
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Thank you! you are pure genius

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August 25th, 2010, 02:45 PM
 LeeTramp
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Happy to find this site on Google. I really like the "y=somenumber and then find the intersection" solution.

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August 25th, 2010, 04:17 PM
 MufinMcFlufin
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Quote:
 Originally Posted by LeeTramp Happy to find this site on Google. I really like the "y=somenumber and then find the intersection" solution.

If you ever have any questions for solutions to other problems you may have on the calculator, then don't hesitate to ask, as I know plenty of nice little solutions to common problems.

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February 18th, 2014, 04:31 PM
 Hj326
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Quote:
 Originally Posted by MufinMcFlufin If you ever have any questions for solutions to other problems you may have on the calculator, then don't hesitate to ask, as I know plenty of nice little solutions to common problems.

Is there a way to check for all solutions that way simultaneously without necessarily knowing how many exist?

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