I am very bad in mathematics and I'm not able to find by myself the model corresponding to this kind of curve.
I wish to have a quick growth at the beginning, then it should increase slowly for a long time and then a quick growth until the end value (here at 10).
This curve represents the basic learning curve: You learn a lot of things at the beginning then you have a time when you don't improve a lot (you are in fact memorizing what you've learnt) and then you become better and better.
Could someone give me a function / model to match this curve ?
Thanks in advance,