high school
posted by Anonymous .
in an inverse relationship, when one variable _______, the other increases.
A. is not affected
B. stays the same
C. increases
D. decreases

Your school subject is NOT high school.
You can either find the answer in your book or you can use this answer from a notoriously unreliable source.
http://wiki.answers.com/Q/In_an_inverse_relationship_when_one_variable_the_other_increases 
This is a better source.
http://en.wikipedia.org/wiki/Inverse_relationship 
I like to think of inverse relationships like this
P=constant/V we say P and V are inverese.
But watch. multiply both sides by V
P*V=constant. Now it is easy to see if P goes up, V has to go down so their product is always the same constant.