### Home > INT1 > Chapter 9 > Lesson 9.1.3 > Problem 9-39

A gallon of milk that cost $

Remember the independent variable () represents years, while the dependent variable (

*) represents price.*

There are two points in this problem.

Point

Point

If the cost is increasing linearly, what is the growth rate? If the cost kept increasing in the same way, what will the milk cost

years from now?

Read the Math Notes box in Lesson 2.3.2 on finding equations of lines with 2 points.

Remember that slope is

Growth rate is $

If the cost is increasing exponentially, what is the growth rate? What will the milk cost in

years?

Review problem 8-121 for a method of solving this problem.

Remember there should be

The multiplier is