Quadrilateral PQRS is located at P (-4,1), Q(-2, 3), R (1, 1), and S(-2,-2). Russell and Jamie have both classified PQRS differently. Examine their proofs. Who is correct?
1) Russell
2) Jamie
3) PQRS is a parallelogram because both pairs of opposite sides are parallel
4) PQRS is a parallelogram because both pairs of opposite sides are congruent
