# Off and On

Henri Picciotto

• Choose values for a, b, and c, pressing enter each time.
• The graph of ax+by=c appears automatically.
• Move the purple dot, what changes?
• Experiment with horizontal and vertical moves.
• What happens when you put the dot on the line?

This applet can be used to explore inequalities in the form ax+by<=c.

If you create a Desmos version of this applet, let me know. I'll link to it and credit you.