Roger is paid $50 to sell videos of a play to an audience after the play is performed.

He also receives $2 for each video he sells. The equation models the amount of money Roger earns selling v videos. The play's audience consists of 230 people.

What is the theoretical domain of the equation?
Question 3 options:

The set of all integers between 0 and 50, inclusive
The set of all real numbers
The set of all integers between 0 and 230, inclusive
The set of all integers