Lines for Equations x=a and y=c

This example demonstrates how to position vertical or horizontal lines representing the equations x=a or y=c. It involves core math concepts like equation representation, linear functions, geometric interpretation of straight lines, and algebra. The construction uses GeoGebra commands/objects such as Random, Line, Element, If, and objects like c_y, c_x, l_2, l_1, A, B, l_u, listlines, linenumber, l_s, button1, showfeedback, answercorrect, text1, text3, text2. It is suitable for high school students learning analytical geometry, particularly for practicing the correspondence between algebraic equations and geometric graphs, serving as a practical tool for understanding and mastering line positioning and equation interpretation.