Linear functions – graphs and the equation ax + b = 0

MathematicsFunctions & GraphsAges 13–14

Graph of y = ax + b on the coordinate plane. Drag the point on the y-axis to change b, drag the second point to change the slope a, and drag point P along the line to read off its coordinates. The app shows the intercepts with both axes, the solution of ax + b = 0, whether the function is increasing or decreasing, and its position relative to a second line (parallel, intersecting, or coincident).