Graphical Solution of e^x = a

This GeoGebra example visualizes the intersection of y=e^x and the horizontal line y=a to solve e^x - a = 0. Core concepts include exponential functions, root finding, and intersection points. Construction uses the Intersect command for points A and B, perpendicular segments for measurement, function objects f and g, constant a, and text labels. Ideal for high school or introductory college students studying graphing, coordinate geometry, and equation solving.