FAQ: Linear Regression - Loss


This community-built FAQ covers the “Loss” exercise from the lesson “Linear Regression”.

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This exercise can be found in the following Codecademy content:

Data Science

Machine Learning

FAQs on the exercise Loss

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Why is Loss measured against the X-axis and not the actual line?


Hi, can anyone help why my list comprehension is invalid?

total loss1 = sum([(y_value -y_predicted) ** 2 for y_value in y for y_predicted in y_predicted1])


Is there a space or an underscore in total_loss1? I don’t spaces are allowed. Try that?


Thanks, you’re right. However, it wouldn’t be correct even with the underscore, because my list comprehension is like 2 for loops embedded inside each other, which is not what we need here.