Coronavirus Outbreak Model

This example demonstrates a simple model for the COVID-19 outbreak using mathematical functions to illustrate the trend of the epidemic. Key math concepts include exponential functions, function graphs, parametric curves, unit circle, cylinder, area, and geometry. The construction uses GeoGebra commands like Line and involves objects such as A1-A12, B1-B12, f, a, C1-C11, and text elements Text1-Text4. Suitable for high school and above students to understand the application of exponential functions in real-world problems.