Final answer:
The x-variable represents the amount that Sam owes Daniel, the y-variable represents the number of hours Sam works, and the other options represent specific amounts mentioned in the situation.The correct option is C.
Step-by-step explanation:
The x-variable represents the amount in dollars that Sam owes Daniel, while the y-variable represents the number of hours Sam works at the airport. So, option A matches the x-variable and option B matches the y-variable.
Option C represents the amount in dollars that Sam has after paying back Daniel, which matches the $12 amount mentioned. Therefore, option C matches the amount in dollars that Sam has after paying back Daniel.
Similarly, option D represents the amount in dollars that Sam earns per hour and matches the $40 amount mentioned. So, option D matches the amount in dollars that Sam earns per hour.
To summarize, option A matches the x-variable, option B matches the y-variable, option C matches the amount in dollars that Sam has after paying back Daniel, and option D matches the amount in dollars that Sam earns per hour.