16/21 decimal rounded to the nearest hundreth

What is best way to getting answer for my exam is

What is the slope of the line shown below?

Val and tony get paid per project. val is paid a project fee of $44 plus $12 per hour. tony is paid a project fee of $35 plus $15 per hour. write an expression to represent how much a company will pay to hire both to work the same number of hours on a project.