Probably a basic calculus question: In this video https://www.coursera.org/learn/advanced-learning-algorithms/lecture/rhcTZ/computation-graph-optional, why is there no derivative with respect to `x`

or with respect to `y`

? is it because the (x,y) pair is training data, we don’t take derivatives with respect to those variables? Why don’t we take derivatives with respect to the inputs?

**Edit** Where is the tag button for future reference, so I can tag it as `week-2`

? If someone can post a screenshot that would be helpful. Thanks