Introduction to Even and Odd Functions

This GeoGebra example demonstrates dynamic checking of function parity via user input. Core concepts include even functions satisfying f(-x)=f(x) and odd functions satisfying f(-x)=-f(x), with symmetric graphing. Construction uses Textfield command for InputBox1, objects a and f for plotting, and text2 for real-time parity output. Designed for high-school function lessons and pre-calculus exploration.