If you know what \displaystyle \frac{dy}{dx} is then you can figure out what
y was by reversing the rules of differentiation. This
is called integration. Functions can be integrated by application of a set of
rules. Later in advanced mathematics these rules become a
major topic of study. You must use the notation accurately.

## Software/Applets used on this page

## Glossary

### differentiation

The process of finding a derivative.

### integration

the process of finding an integral, the reverse process to differentiation.

### union

The union of two sets A and B is the set containing all the elements of A and B.