Investigation of Growth and Decay Phenomena by Exponential and Logarithmic Functions

Driving Questions

  1. How can mathematical models be used to represent phenomena involving exponential growth or decay?
  2. What insights can be gained from applying mathematical modeling to real-world scenarios?

Project Introduction

Disciplines/Subjects: Mathematics, Scientific Research, Data Science

Key Themes: Exponential and Logarithmic Modeling, Growth and Decay Phenomena, Mathematical Representation of Real-World Processes


In this project, learners selected topics of personal interest related to phenomena that exhibit exponential growth or decay, such as population dynamics, radioactive decay, or, as in this example, memory retention. This sample work explores Ebbinghaus’ Memory Curve, which describes the decline of memory retention over time. Using experimental data collected from peers, the student modeled the decay process with exponential functions and investigated the effect of review sessions on memory retention. The project illustrates the practical application of mathematics in diverse fields and fosters analytical skills through data-driven inquiry.

Core Competency

Habits of mind: Curiosity, Continuous Learning, Strive for Excellence

Transferable skills: Organizing & Representing Information, Identifying Patterns and Relationships, Interpreting Data/Information to Make Valid Claims

Content Knowledge:

Understanding exponential and logarithmic functions.

Researching and analyzing existing data from reliable sources or conducting experiments.

Applying mathematical modeling to real-world scenarios.