# Area Between Curves

Earlier in this chapter, we used definite integrals to find the area under a function and above the x axis. By writing

or

we find the area under the function, above the *x* axis, and between x = *a* and *x* = *b*. In this section, we’ll use these areas to find the area between *f *(*x*) and *g*(*x*) from x = *a* to *x* = *b*.

We’ll use this area to define two important concepts in economics, consumers’ surplus and producers’ surplus.

**Read **in Section 14.3

Section 14.3 Workbook (PDF) – 9/5/19

**Watch **Videos

**Do Homework**for Section 14.3