A trucking company transports goods between two cities that are 960 miles apart. The company​ charges, for each​ pound, $0.55 per mile for the first 100​ miles, $0.40 per mile for the next 300​ miles, $0.30 per mile for the next 400​ miles, and no charge for the remaining 160 miles.

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.