Thank you for your advice.
Zizi Your latest chart showing the Logarithmic trendline is precisely what I have been hoping to achieve. It is exactly in line with my inserted trendlines in the various charts I have experimented with and it is what I fully expect to see as confirmed from another much more involved chart that I have also done. I can see what you have done to create this and I just need to study up on the HOW of the LOGEST and LINEST formulas for me to be able to create my own virtual trendlines in the future.
Should I be concerned with an R2 of 0.8888323 as the results seem to be very accurate? Could the Linest be accurately used with a Power trendline as this seemed in my situation to be the next most accurate? In the beginning I actually expected the Exponential trendline was going to be the most accurate but it was not and I wonder if the fact that the rewards or the reward rates are decreasing and nit increasing over time whether that negates the useful accuracy of choosing Exponential in that case?
Zizi I want to thank you for your persistence with solving my problem. It has been difficult because I do not have the same level of mathematics abilities as you obviously have. I have learned a lot along the way but some of it goes over my head but in time I am normally able to pick up most of the important parts, hopefully.
I will leave you in peace now and will mark this as the Solution. Thank you and I wish you all the very best for 2024 