C1_W2_Lab03_Feature_Scaling_and_Learning_Rate_Soln/ Where is "gradient_function"?

I noticed within the imported functions:

“from lab_utils_multi import load_house_data, run_gradient_descent”

“gradient_function” have been called a few times.

But I didnt find the “gradient_function” nowhere in the original lab notebook or the “lab_utils_multi”.

Could you please help with that?

I think this has been answered in your other thread.