24 interactive flashcards covering parametric and implicitly defined functions, conic sections, vectors, and matrices. Tap a card to flip it.
Active recall is the most effective way to study. Look at the term, try to say the definition out loud before tapping to flip. If you got it wrong, mentally note it and come back to it.
Unit 4 is not tested on the AP Exam, but these ideas are strong preparation for calculus and linear algebra. Run through all 24 cards a few times, and hit shuffle on later passes so you're not memorizing the order.