Which of the following is the correct way to define a model function for use with curve_fit?

easy📝 Syntax Q3 of 15

SciPy - Curve Fitting and Regression

Which of the following is the correct way to define a model function for use with curve_fit?

Adef model(x, a): return a + b * x

Bdef model(a, b, x): return a * x + b

Cdef model(x): return a * x + b

Ddef model(x, a, b): return a * x + b

Step-by-Step Solution

Solution:

Step 1: Understand parameter order in model function
The model function must have the independent variable first, then parameters.
Step 2: Check each option
def model(x, a, b): return a * x + b has x first, then parameters a and b, which is correct.
Final Answer:
def model(x, a, b): return a * x + b -> Option D
Quick Check:
Model function = x first, then parameters [OK]

Quick Trick: Model function: independent variable first, then parameters [OK]

Common Mistakes:

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