Graphically Calculate Derivative

This example demonstrates how to calculate derivatives graphically. The key mathematical concept is the derivative, which represents the instantaneous rate of change of a function at a point. By constructing tangent and secant lines, the concept of a derivative is visually understood. GeoGebra commands used include Point, Line, Segment, Tangent, Midpoint, and Textfield. Suitable for high school mathematics education and learning derivative concepts.