Please answer this fast and correctly.

Whats the name of the vertical axis

Tom wants to order tickets online so that he and three of his friends can go to a water park the cost of the tickets is 16.00 per person there is also a 2.50 one-time service fee for ordering tickets online write an expression in term of n that represents the cost for n ordering tickets online

Which inequality statement describes the two numbers on a number line? "? 7 and a number 5 units to the right of ? 7"