Answer: C. $200 
Explanation:
because Sales = 5x
and x is the total number of frisbees sold.
Profit = Sales - Cost
Profit = 5x - 200
The domain is the total number of frisbees sold. 
The range is the y-value. It can either be the Sales revenue or the profit. 
Therefore, the correct answer would be C.$200. 
* Hopefully this helps:)