Definite Integral Visualization - Area Under a Curve Explained #3301568 (License: Personal Use)

This diagram illustrates the fundamental concept of the definite integral in calculus: the signed area bounded by the curve y = f(x), the x-axis, and the vertical lines x = a and x = b. The region is shaded to emphasize that integration computes accumulated quantity, such as area, over an interval. The curve may rise or fall, but the shaded region reflects the net positive area above the axis.

Used in educational content about integral calculus, especially introductory lessons on Riemann sums and the Fundamental Theorem of Calculus; matches user intent to understand visual interpretation of integrals.