Which table has a constant of proportionality between y and x of 1/5?
X Y = A
2 4/5
7 14/5
12 24/5

X Y = B
8 8/5
9 9/5
10 2

X Y = C
3 16/5
5 26/5
7 36/5

Abari owns 100 shares of stock a and 45 shares of stock b. for the past month, his stocks have been fluctuating inversely. stock a decreased by m cents per share and stock b increased by n cents per share. which equation can be used to find the total change in value of jabari's shares per month?