Y 4 3 2 2 -4 -3 -2 -1 1 2 3 4 -1+ -2- -3+ -4- What is the slope of the line? Khan academy

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.