Curve Fit Analysis

[SergeArmz]

Thank you very much DFGray, you have explained very clear what was causing me to have not accurate results, right now I have confirmed my integration vs my manual calculations and they really match

I'll put  5 stars to your professional advice

Have a great day!

[SergeArmz]

Thank you very much NaruF1, I'll try the cursor thing in order to shade the area of interest for the integration

[NarayananK]

Good to know you have found the solution!

Have attached the 8.5 Version.