03. Area when curves cross – Practice Quiz

Find where curves exchange upper and lower positions, then sum nonnegative vertical-slice areas. Prerequisite: fixed-order area integrals. Practice distinguishes crossings, touching points and signed cancellation without adding horizontal-slicing calculations.

Cover: Area between 2 Functions by Yomomo, CC BY-SA 4.0. Rasterized and padded to fit; derivative cover under the same license.