Parabola with Secant(slider) and Tangent

This example demonstrates a parabola with a fixed point and a point controlled by a slider, showing the secant line through both points and the tangent line at the fixed point. Core math concepts include parabolas, secants, tangents, and derivatives. It is constructed using GeoGebra's Line and Tangent commands with objects like function f, point P, slider a, point Q, and parameters b and c. Suitable for high school mathematics to explore geometric properties and calculus concepts.