Need help with custom Mathematical Formula

[Trle94]

Hello there, im working on some school project, and i need to work with some interpolation tables from my notebook to get right number, there is alot of them to do and it is very slowly if i do it by my hand on notebook so if someone could help me making function in excel it would be nice??

Here is how it looks like:
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[loginjmor]

Hi -

I've been where you are. I think it would be best if you do the homework either by hand OR derive your own formula to interpolate numbers in excel. That should get you extra credit as it would demonstrate a thorough understanding of interpolation if you wrote your own program.

Good luck and study hard - It will pay off later.

[Trle94]

Im begginer with Excel and i will it use it now and god knows when again. that is reason why i came here if someone want to make it in excel for me. Thank you