♾️ap calculus ab/bc review

Dy

Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examWritten by the Fiveable Content Team • Last updated September 2025

Definition

In calculus, dy represents an infinitesimally small change or increment in y. It is often used when finding derivatives or approximating changes in a function.