Answer:
it would be the first one!
I will set it up for you only.
Let a = adult tickets
Let s = student tickets
Here is your system of equations:
a + s = 800
12a + 8s = 7500
2.35 is already rounded to the nearest hundredth.
F(x)-4 : translated 4 units down
4f(x) : vertical stretched by a factor of 4