Writing The graph shows a proportional The equation y=models the relationship. relationship between the variables y and x. Write
an equation to model the relationship. Use pencil
and paper. Explain how you know there is a
proportional relationship if you are given either
an equation or a graph.

Which statement explains how you could use coordinate geometry to prove the opposite sides of a quadrilateral are congruent? a. use the slope formula to prove the slopes of the opposite sides are the same. b. use the slope formula to prove the slopes of the opposite sides are opposite reciprocals. c. use the distance formula to prove the lengths of the opposite sides are the same. d. use the distance formula to prove the midpoints of the opposite sides are the same.