Self Checking / Grading a graph

I am having trouble setting up the code for slides 9-12. I want to have the button give feedback based on if the students graph the dilations correct or not.

Desmos Activity

What type of feedback do you want? Some sort of visual feedback I think would be good, but not entirely sure what that would look like.

Random suggestion: For Screen 3, you might consider limiting A’ to be on screen. You can drag it off screen and let go, but then it’s lost and can’t adjust after that.

Just like a sentence that tells them that they got it correct or not would be great. I think I would have to add a button option where they can press to check but coding that button is where I am having issues.

Thank you for the suggestion for screen 3, I will fix that right now.