This applet illustrates the meaning of the slope and intercept parameters of a straight line, by graphing the line they define, and allowing you to change them as you wish.

You can change the slope a and y-intercept b by moving the sliders or by clicking inside the circles that contain arrows.

This tool uses JQWidgets extensively. Please verify their copyright.

Developed by Daniel Kleitman and Jean-Michel Claus.

Line is defined by: y = ax + b

Show a
Show b