Reflection in the y-axis: Interactive GeoGebra Demo

This GeoGebra example demonstrates the reflection (mirror) transformation of a graph or geometric object across the y-axis. The core mathematical concept is axial symmetry in the Cartesian coordinate system, where every point (x, y) maps to (-x, y). It involves function symmetry, quadratic equations, tangent functions, secant lines, and exponents. The construction uses GeoGebra objects such as f (likely a function), c (possibly a curve or circle), d (possibly a line or reflected object), and text objects (text1, text2, text5, text6, text7) for labels, with parameter a controlling dynamics. This is suitable for middle and high school students learning about function symmetry, coordinate transformations, and geometric reflections, and is ideal for classroom demonstrations or self-guided exploration of reflection properties.