How to calculate bubbles radiuses depends of data?

Have a question about cryptobubbles bubbles radiuses mathematics

Can somebody write a formula of dependences between percentage of coin and radius of babble?
this dependence is definitely not linear
But I can’t understand true dependence

Thanks!

I have linear formula
let d = (maxDiametr / 100 * (currentPercentage / (maxPercentage / 100)))

But want to understand hot to calculate some coefficient to make it work similar to cryptobubbles