Find the average value of the function 
over the plane region 
. 
and 
is the triangle with vertices 
, 
and 
.
Definitions:
Resource Demand Schedule
A table or graph showing the quantity of a resource that firms are willing and able to hire at different wages or prices.
Firm
An organization that produces and sells goods or services in order to make a profit.
Derived Demand
Derived demand refers to the demand for a good or service that arises from the demand for another good or service it produces or contributes to.
Labor Service
The work performed by employees for employers, contributing to the production of goods or the provision of services in exchange for wages.
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