Demo: Piecewise Linear Function Defined Using Points

This example demonstrates how to define and graph a piecewise linear function using specific points. It involves core math concepts like piecewise functions, coordinate geometry, and linear equations. The construction uses GeoGebra commands Sort and Element, manipulating objects such as points A, B, C, D, lines l1, l2, and points A1, B1, C1, D1, along with function g. Suitable for high school mathematics education.