- Start with a discovery task asking students to draw two lines intersecting 0, 1, 2, 3, etc times to get them to understand that lines can only intersect 0, 1, or infinite times. - Then, use Desmos to have them plot two linear equations at a time (in slope intercept form) to try to recognize patterns for when only one intersection occurs, when zero occurs, and when infinite occurs (might need to use standard form for one of the equations on this one).