Dont tell me the Answer but walk me through the steps plz

Can some one me with these questions

Write an equation for the function that includes the points (2,100)and (3,100)

Dean and karlene get paid to write songs. dean is paid a one-time fee of $20 plus $80 per day. karlene is paid a one-time fee of $25 plus $100 per day. write an expression to represent how much a producer will pay to hire both to work the same number of days on a song.