Derivative and Graph

This example demonstrates the relationship between a function and its derivative graphically, intuitively showing the geometric meaning of derivatives. Core math concepts include derivatives, trigonometry, inequalities, and normal distribution. It uses GeoGebra commands like Textfield to create text fields, involving objects such as function f, input box InputBox1, derivative f', and text text1. Suitable for high school and above students learning calculus and function graph analysis, or for teaching demonstrations.