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https://www.mathed.page/attc/plaid/off-and-on.html
Henri Picciotto's Math Education Page
Henri Picciotto
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.
Download the GeoGebra file.
Lesson plan and extension:
Off and On / Add Till It's Plaid