Polynomial equation error

Hi, Im using a polynominal equation for a last year thesis but have been having a problem.

I have used every polynominal order however none are giving me the correct answer which im using to compare with measured data in order to validate the polynominal equation is working correctly, it is not as you can see in my attached image i have used 10 as "x" however answer is not giving me the same answer as he measured data for 10.

how could i fix this issue? decimal places have already been increased but made no difference.

I have already imported the data on Matlab and used the polynominal function on there instead which did give an answer identical to the measured data so im just curious into what the issue with excel is?

Thanks

Thank you , you were right, changed the graph to xy scatter and gave me the correct answer. Thanks again, much appreciated.

Originally Posted by jayjones90

Thank you , you were right, changed the graph to xy scatter and gave me the correct answer.

When you crosspost (here) [1], it is incumbent upon you to post an update in the other threads when the problem is solved so that others (moi!) do not waste a lot of time offering explanations of a problem you already understand well enough (5 hours earlier).

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[1] http://www.mrexcel.com/forum/excel-questions/977161-polynominal-equation-error.html#post4688909

Originally Posted by Pepe Le Mokko

Your post does not comply with Rule 8 of our Forum RULES. Do not crosspost your question on multiple forums without including links here to the other threads on other forums.

Cross-posting is when you post the same question in other forums on the web. The last thing you want to do is waste people's time working on an issue you have already resolved elsewhere. We prefer that you not cross-post at all, but if you do (and it's unlikely to go unnoticed), you MUST provide a link (copy the url from the address bar in your browser) to the cross-post.

Expect cross-posted questions without a link to be closed and a message will be posted by the moderator explaining why. We are here to help so help us to help you!

Read this to understand why we ask you to do this, and then please edit your first post to include links to any and all cross-posts in any other forums (not just this site).

Cross posted at Mr E and MSOffice forums

Sorry this was the first time using a forum, i apologize for the inconvenience it had caused. Will not happen again.