Locking a Moveable Point with the Action Button

Hello! I am trying to create an assignment where students are creating a sign line for a rational function by dragging images (attached to moveable points) into place. I want them to be able to see what they got correct (handled) but also not be able to change their answers after they check it. Is this possible? Here’s the activity so far:

Check this thread:

Thank you! I was sure there must be a post somewhere but couldn’t find it. That worked!

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Hey, would you be willing to look at this activity? I’ve tried doing what you described and it’s not locking the points in. I’m not sure what I missed. (I do know there are ordered lists but wanted the problems randomized… thus using the graph to try it.)

Never mind! I got it working!

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