I have a dataset of two column values something like the one shown below. I need to predict the values of y for values of x greater than 60. The curve must follow the increasing trend it is shown till x=60.
I have tried polynomial regression and SVR but it declines for values greater than 60. I have tried to fit the curve y = alnx + b to this curve but the R2score is 0.94. What model can I train for this purpose, or how can I improve the R2score but regressing over an appropriate logarithmic function?
That can be informative, but as I was saying, you have to limit the function space to those compatible with your hypothesis.
I repeat my question in a clearer way: do you know (or have a guess of) what the function would look like after x=60?
Since you mentioned the rate of change, have you ever plotted the numerical derivative of this function? Maybe it’s shape has a recognizable shape that could help you in identifying the right class