Cooper claims he has already completed the job and is offered $141 as a one time payment.

you have to write this as c = mt + b if c is the cost, m is the slope, t is the time(hours) and b is y-intercept!!! PLEASE HELP!

Is this question based off another that has already been posted?

Regardless, with the information given, you cannot give the answer in a completely linear form because $141 is only a constant (as denoted by "as a one-time payment")

Your equation would then be:

cost = constant