I have a set of real-world data points that I wanted to find a curve for, to help with additional numbers. I plotted them on a graph using desmos and can get a decent approximation of what values would be alone the curve. I thought I'd run a Lagrange interpolation using DCode to find the formula, but it created a bumpy ultra-specific tangent-like curve while I was expecting a smooth log-like curve. :) This might be due to noise in the real world data, of course.
https://www.desmos.com/calculator/dyxtcmpgtf <-- probably not the curve I'm looking for :)
Anyway, just thought I'd throw it out there to y'all in case you have a better process. Or, just confirm to me that it's an impossible task!