# Function domain word problems

Use information about a situation to figure out the domain of the function which models it.

### Problem

Wang Lei is arranging a benefit gala. There is a total of 900 tickets, and each costs dollar sign, 100.
Let M, left parenthesis, n, right parenthesis denote the total money raised M (measured in dollars) from selling n tickets.
Which number type is more appropriate for the domain of the function?
Please choose from one of the following options.
Define the interval of the domain.
comma