Not sure if this will help?
In an analysis of a very similar data set...
1. The initial plot doesnt' have a curve fit, because it doesn't have a model to make the curve yet
![Byron_JMP_0-1724088610696.png Byron_JMP_0-1724088610696.png](/t5/image/serverpage/image-id/67272i95F01105DFE6E501/image-size/medium?v=v2&px=400)
2. After fitting a model:
![Byron_JMP_1-1724088651450.png Byron_JMP_1-1724088651450.png](/t5/image/serverpage/image-id/67273i91B4FAFDB065D2AD/image-size/medium?v=v2&px=400)
The fitted curve is displayed in the fit of the model
![Byron_JMP_2-1724088702419.png Byron_JMP_2-1724088702419.png](/t5/image/serverpage/image-id/67274iCECE37A66F5297A1/image-size/medium?v=v2&px=400)
JMP Systems Engineer, Health and Life Sciences (Pharma)