The definite integral represents the area between a curve and the x-axis over a specified interval.

Integration with respect to y involves finding the area between curves by summing horizontal slices along the y-axis.

Horizontal slices are rectangles used to approximate the area between curves when integrating with respect to y.

Points where two or more curves meet; used to determine the limits of integration.

The area between the curves is found by integrating $f(y) - g(y)$ over the interval where $f(y)$ is above $g(y)$.

Intersection points are where the curves intersect on the graph; these points determine the limits of integration.

$A = \int_{c}^{d} |f(y) - g(y)| , dy$

Set the two functions equal to each other and solve for $y$.