B, because to substitute for a variable you have to have an equation to substitute first.
It is H, 2,9 because if you connect it with the other points, it will form a trapezoid.
Answer:
The max. revenue is $57,121.
This happens with 239 passengers.
The price of the ticket is $239 per person.
Step-by-step explanation:
Let the variable "P" denote the number of passengers.
If P=180, then the ticket cost is $298/person. Then the price is reduced by $1 for each additional person.
In general, if P=(180+x), then the ticket cost becomes (298-x) per person.
The revenue can be defined as the ticket cost multplied by the number of passengers:

We can derive R and equal to zero to maximize the function.

The amount of passengers is:
The price of the tickets is

The revenue is:
-2 + 3(4x - 3) = 16
-2 + 12x - 9 = 16
-11 + 12x = 16
-11 + 11 + 12x = 16 + 11
12x = 27
12x/12 = 27/12
X = 2 3/12
X = 2 1/4