Phone-friendly Linear Equation Graphing

This interactive GeoGebra demonstration illustrates how the linear function y = mx + b changes as parameters m (slope) and b (y-intercept) vary. Using GeoGebra commands Slope (to calculate line slope), Intersect (to find axis intersections), and Segment (to draw key line segments), students can dynamically explore: (1) How slope m determines the line's direction and steepness; (2) How intercept b positions the line on the y-axis; (3) The behavior of lines with positive, negative, and zero slopes. The phone-friendly design ensures smooth interaction on mobile devices. Ideal for middle school mathematics teaching of linear functions, suitable for classroom demonstration or student self-directed learning to deepen understanding of function graphs and parameter relationships.