In which of the tables below x and y are inversely proportional? find the constant of variation.

can you tell me which ones are inversly and directly proportiional and the constant of variation for each :

a)

l x l 3 l 4 l 5 l5.5 l
l__l__l__l
l y l 8 l 6 l 4.8 l4 l
l__l__l__l

b)

x 0.1 0.5 75 100
y 300 60 0.4 0.3
(pretend thats a chart)

can you tell me which ones are inversly and directly inversable and the constant of variation for each :