# Rate of increase problem

1. May 3, 2004

### mustang

A gallon of milk was $1.79 two years ago. Today, it's$2.15. Find the rate it increased each year.

2. May 4, 2004

Is the rate of increase constant?

3. May 4, 2004

### Integral

Staff Emeritus
As for any rate of change problem

$$r = \frac {\Delta P} {\Delta t}$$

r is the rate of change, P is price, t is time.

4. May 5, 2004