# Simple Rate of Change

- Author:
- Niall Boyle, Walch Education

Jasper has invested an amount of money into a savings account. The graph below shows the value of his investment over a period of time.
What is the rate of change for the interval [1, 3]?

- Determine the interval to be observed.
- Identify the starting point of the interval.
- Identify the ending point of the interval.
- Substitute the starting point and ending point into the slope formula to calculate the rate of change.