Always check your residual plots. If you see a pattern in the residuals, your chosen model is likely wrong.
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Be extremely cautious when using a fitted curve to predict values far outside your measured data range. Conclusion Always check your residual plots
At its core, curve fitting is the process of constructing a mathematical function that has the best fit to a series of data points. It allows you to: See the underlying pattern in noisy data. Interpolate: Predict values between known data points. curve fitting download