What is 4 1/2-3 5/6 from page 393 GO Math book

The rows and columns of lattice points in a three-by-three square array are evenly spaced one unit apart. how many distinct triangles with at least one side of length 2 units can be drawn using three lattice points for the vertices?

I'll give brainliest if you answer right : )

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?