Directional Derivative Demo by Esteban Diaz UTA

This example demonstrates the geometric meaning of directional derivatives, showing how the rate of change of a function varies in different directions at a point. Key math concepts include directional derivatives, gradients, and the relationship between vectors and function graphs. Construction highlights: the GeoGebra command 'object f' represents the function itself. Suitable for high school students and above studying calculus, or for university-level foundational mathematics instruction.