Check for correctness of two points dragged specific locations on a graph

Questions
1

This seems to me that I am making a really easy task hard… How do you code for two different draggable points to be moved to a specific coordinate on a graph?

2

This is in order to be able to check for their correctness.

3

You can check it all inside the graph, and then pull the correctness number (in this case, C) from the graph using CL. check 2 points | Desmos

4

THANK YOU SO MUCH! I was able to crank out several questions using this!! I sincerely appreciate your help! Have a great remainder of the weekend!