How to get slope from standard form.

Which expression is equivalent to7_/x^2 ÷ 5_/y^3? assume y# 0

The volume of a box varies directly with its length if a box in the group has a length of 30inches and k=24 what is its volume

Can you me with this question? i'll reward *30 points i just need with this one question so that i could solve the others. * edit: i originally set up the question to reward 30 points, but for some reason i can only reward 15. if you don't get 30, then i'm sorry. i'm still kind of new to this site