Well, we can see that the y-intercept is (0, -4) which means that the line must be:
y=mx-4
And since only one answer has -4 as the y-intercept, y=x-4 is the answer :P
The answer for this problem is 4
Actually, the area of a triangle is a = bh/2. If a = 30 and b = 12:



So he height is 5 units
A student ticket cost $4 which is half the price of a full price ticket
1,805 feet because if you subtract -2 from 1,803, 1,803 - (-2) is a double negative so it would turn into 1,803 + 2