I am new to CL, and not particularly good at it, so I’m having a hard time creating what I envision. I’d like to create an activity in which students choose a point, test it in an inequality, say y<=2x-3, and then plot a green (draggable) point if it works and a red (draggable) point if it doesn’t… Then show all the classes responses to notice that all the green dots are in one area (and hopefully zero in on errant mis-colored dots, understand the student error, then give students a chance to fix…) Then overlay the line y=2x-3 to show that all the points that work are on one side of the line. Rinse and repeat a few times, maybe with the 2nd time y<2x-3, and later x>4, y<5, etc on the x-y plane.

Is there anyone out there who has made a similar activity, or who could help me create such an activity?

I appreciate any help and/or redirection. Thank you.