The graph shown in the figure shows the results of measurements of the dc current through a circuit device for various potential differences across it. Assume that all the numbers shown are accurate to two significant figures. What is the resistance of this device? 
Definitions:
Marginal Cost
The hike in expense for producing another unit of a product or service.
Marginal Revenue
The extra revenue a company earns by selling an additional unit of a product or service.
Output Level
The quantity of goods or services produced by a business, industry, or economy at a given time.
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