When modeling hourly pay, which part of the equation is used to represent the total pay?

Areal estate agent earns $32,000 a year plus $1,000 for each apartment he sells. write an equation that shows the relationship between the number of apartments abe sells,n, and the total amount he earns in a year,e. what is the total amount abe would earn from selling 10 apartments in one year

How do i do this activity, is appreciated

What expression is equivalent to 42x-56y