Q11 no more negative values for linear model

Hello,

I don’t understand why when we proceed as we do in the last wrap up quizz question, there is no more negative value predicted by the linear model while before on all the set there were negative values.

What’s the exact reason plz ? i can’t really figure it out

Thank you very much, especially for the MOOC and all you’re valuable answers I scikit-learned a lot !

Geoffrey

Indeed, we cherry-picked a portion of the data corresponding to the cyclist climbing a hill. In this configuration, there is not data that is related to power dissipation via braking (as in downhill) and thus no issue with negative power values.