As the question says when there's no overtime, you only care about normal working hours.
E= 16x
Your insight that the function values differ by 5 every time is very important. So your f(x) will contain 5x as a term. You have to find a constant to add or subtract to make sure f(1)=-2.
f(x) = 5x-7 does the job.
C=3 is your answer !!!!!!!
I think B similar but you can use quizzing to find the answer that always gives you answers to the WHOLE quizz