18.4 Outline

A.  Area function
      1. definition
      2. antiderivative
      3. antiderivative of e^x.
      4. properties of antiderivative
          a. constant multiple
          b. antiderivative of a sum
B. Antiderivative's as area
C. The definite integral
      1. definition
      2. integral
      3. limits of integration
      4. dummy variable
      5. indefinite integral
D.  Areas as antiderivatives

18.4 Essential Ideas