In one part of the world the sea lion population decreased approximately linearly from about 48 thousand in 1988 to about 25 thousand in 2001 find the average rate of change of the sea lion population per year

Which is equivalent to 10/12? options: 10/18 5/6 3/12 9/11

Ineed in figuring out this problem.

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.