Use the following to answer questions:
Figure: The Demand Curve 
-(Figure: The Demand Curve) Look at the figure The Demand Curve. If the price is $8, total revenue is _____. If the price is $7, total revenue is _____.
Definitions:
Systematic Study
The examination and investigation of phenomena through structured, methodical, and empirical means, often used in scientific and academic research.
Social Networks
Platforms or structures that connect individuals and organizations, facilitating communication and interaction.
Personal Troubles
Individual challenges and problems that are experienced by a person, often considered in the context of wider societal issues.
Social Issues
Problems faced by large numbers of people within a society, which often require intervention by public policy or social services.
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