To use your expression in the Curve Fitter app, you can follow these steps:
- Open the Curve Fitter app and import your data.
- In the "Equation Settings" section, select "Custom Equation".
- Enter the modified expression in the "Equation" field: A*(d^n)*exp(B*X) + C*X.
- In the "Coefficients" section,the four coefficient will automatically reflect. If not, then you can add them mannually.
- In the "Coefficient Starting Values" section, enter initial guesses for the four constants.
- Since 'd' is a known constant, you can set the start, upper and lower limit as same values.
By fixing the value of d as a constant, the curve fitting app will estimate the values of A, B, C, and n that best fit the data while keeping d fixed at its known value.
To know more about the interactive curve and surface fitting, you can refer to the following documentation
