How to determine the function from its graph if it has a non-simple shape?(adsbygoogle = window.adsbygoogle || []).push({});

Given a graph (see attachment) where set of coordinates of any point is known. Are there any techniques to find an equation of the function? So far i can guess, that i need to measure the derivative at multiple points, then plot it, then find graph of second derivative and so on until i get a 0 derivative, and then integrate backwards to obtain original equation.

Could anyone please mention whether there are some techniques to perform such evaluations i could read about?

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# Determine function from the graph

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