ASAP HELP WHAT IS B AND C

Which statement explains how you could use coordinate geometry to prove that quadrilateral abcd is a parallelogram? -5 -4 -3 -2 -1 t 1 2 3 4 prove that all sides are congruent and have slopes that are opposite reciprocals prove that segments ad and ab are congruent and parallel prove that opposite sides are congruent and have equal slopes prove that segments bc and cd are congruent and parallel

What’s 8y+48 and factor each expression completely

I'm a polygon i have no parallel lines i am formed 3 line segments i have one right angle two of my angles are angles what am i