Aparabola has a vertex at (3,4) and passes through point (-2,-9/4) as shown to the right. which of the following is the equation for the parabola?

a. y= -4(x-3)^2+4
b. y= -1/4(x-3)^2+4
c. y= -1/2(x-3)+4

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?