Answer:
A) 80$/hour
Explanation:
We can see that in 1 hour, the line passes through the point (1,80), which means that in 1 hour, the cost is $80.
In half an hour (30 mins), the cost would be $40, which takes out options B and D.
Option C is incorrect, because 80 hours isn't the right label, it would be $80/hour.
This makes option A the correct choice.
Hope this helps!