This paragraph seems like it might work in another section on how chart cell works? Maybe on the eject to JS?

I struggled here with how much a tutorial should include "how it works" information vs. here's how to use it -- maybe just point to the documentation for more info?

I think that makes sense. The intro paragraph is great, this one just felt a little out of place.

I don't think we're using this? (I would like us to use this dataset more!) But we can remove for now.

oh yeah I had started tinkering with it, but forgot to remove

Did you want to set flipper_length_mm as the value for x?

Thanks! Updated