Homework, mock exam, final exam

If you choose the setting by peeking at the test dots, your score is a lie. Here the data is split three ways, so the final exam stays honest.

Try this

Panel A: drag the degree from 1 to 15, pick the bottom of the orange validation line, then tick Reveal test dots.
Close, but not always exact. Now press New dataset three times and pick by validation each time.
The pick jumps around (3 to 6). One mock exam is a noisy judge.

This is part of Session 2 of How AI Learns. The full session adds the story, the Python build and a boss challenge.