Glossary · Phase 2 · Math, when you need it
Target
The right answer a model should give for an example, such as the true sale amount. The loss measures how far the prediction is from it.
Learn it properly
The chain rule · Derivatives of functions inside functions: the heart of backprop. About 30 minutes.
Other terms from the same lesson
- chain rule: To find how a chain of steps responds to a nudge, multiply how much each step responds.