When graphed in the xy-plane, what is the y-coordinate of the vertex of the parabola with equation y = -3 (2 - 4) (x + 6)? A
75
B
63
-1
D
-33

look a the sides they are perpendicular

change of stock price/initial stock price on friday * total stock value = change of stock value

0.89/73.73 *x = 42.72

x=3539.04 = total stock value at initial stock price on friday .

total stock value at initial stock price on friday/ initial stock price on friday = number of shares

3539.04/73.73 = 48 shares

they own 48 shares of this stock