Need some help with this!

Last one and the bottom answer choice is y=(x-4)^2+1 you guys!

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.

Cody ran nine miles on his first day of training. the next day he ran 1/8 that distance. how far did he run the second day?