Common Math Equations for Science and Engineering

Once in a while you run into a problem that needs a little math. Today I was working on interpreting a signal from a proprietary interface board, which sends out a pulse, of which the length depended on “x”. However, the relation of x and the pulse length was not linear. It looked like a logarithmical relation, or was it something else?
I Google’d “common math equations”, “math curves” etc. but nothing turned up. What I was looking for, was something like this:

Screen shot 2013-12-11 at 13.13.36

So I decided to make it and share it with the rest of the world. I hereby release it under a Creative Commons BY-NC-SA license. Feel free to remix!

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