To answer this question, you need to subtitute a number for each n. First find the first and then push off of there.
Answer:
-5/2 because there is -5y/2 but we have to take coefficient only so -5/2
To answer this (specifically the first one) you have to count how many spaces each point moves. (How many spaces up/down does it go? Left/right?) then you put rise (up/down) over run (left/right) and you should get the slope!
Add both of thr meters together (660 meters) and multiply by 3 (the feet). you should get 1980 feet