Use a graphing utility to determine which graph below is the graph of the function. 
Definitions:
Total Fixed
All expenses that are unchanged irrespective of the volume of production or output combined.
Total Variable Costs
The sum of expenses that vary directly with the level of production or sales volume.
Drones
Unmanned aerial vehicles (UAVs) operated by remote control or autonomous software, used for various purposes including photography, surveillance, and delivery.
Total Variable Costs
The expenses that change in proportion to the activity of a business.
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