Activity 3.7.6 could use a revisit.

[jbunn3]

Activity 3.7.6
https://3c33850e.tbil.pages.dev/preview/calculus/AD7#activity-graphing-checkit

The activity uses information from f' and f'' to sketch a graph, but it isn't clear whether the reader is supposed to infer that the given points are critical points when the sign of f' changes, for example.