Suppose that production of a certain agricultural crop is related to the number of hours of labor x, and the number of acres of the crop y, according to 
Find the rate of change of the number of hours, with respect to the number of acres.
Definitions:
Total Revenue
The complete amount of income generated by the sale of goods or services before any costs are subtracted.
Production Data
Information related to the process of manufacturing or creating goods and services.
Sales Data
Information collected about the sales of products or services, used for analysis and business planning.
Total Cost
The complete cost of production or operation, combining both fixed and variable expenses.
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