We need to calculate 3/4 of Bus 1 and 2/3 of Bus 2. Then compare the two.
Bus 1:
60 * 3/4 = 45
Bus 2:
60 * 2/3 = 40
Thus,
45 - 40 = 5
Y = a(x + 1.5)^2 - 12.5
y intercept is (0,-8) so:-
-8 = a(0+1.5)^2 - 12.5
-8 = 2.25a - 12.5
a = 4.5/ 2.25 = 2
so we have
y = 2 ( x +1.5)^2 - 12.5
solving for x when y = 0:-
(x + 1.5)^2 = 12.5/2 = 6.25
taking sqrt's x + 1.5 = +/- 2.5
x = -4, 1
so the x intercepts are (-4,0) and (1,0)
i believe the answer is B
but i could always be wrong :(
