Integer Counter Activity

I am making an adding and subtracting integer activity for my math 7 class. I would like a way to determine the correctness of the model. Is there a way for the computational layer to count how many points are in a region? I would like my students to drag the points into the box and for Desmos to count how many of the points are in the correct region.

Here’s a link to my activity. Thanks

I made this a while back if you want to take a look: