The Rule of 70 (ARC)

Michael Fulkerson, University of Central Oklahoma
Kristi Karber, University of Central Oklahoma
Scott Williams, University of Central Oklahoma

This lesson explores the Rule of 70, a financial mathematics concept that estimates the time it takes for an investment to double at a given annual interest rate, compounded continuously. Students will use both algebraic methods and an interactive Desmos activity to understand and apply the rule, enhancing their grasp of logarithms, exponential growth, and financial literacy.

Lesson Plan
Activity
Activity Solutions

This work is licensed under CC BY-NC-SA 4.0