Answer:
This is pretty simple, it tells you that two tickets are worth $18, to figure out how much one would cost you just divide 18/2 and that would equal $9. So Your answer would be Each ticket sold yields $9 of profit.
Here, Let, Number of Ticket = x
Sold profit = y
Then, relation would be: 18/2 = 9
y = 9x
In short, Your Answer would be Option B) "Each ticket sold yields $9 of profit"
Hope this helps!