Find an equation of the tangent line to the graph of the function f defined by the equation at the indicated point. 
Definitions:
Business Savings
Business Savings refers to the portion of a business's profits that are set aside for future investment, as opposed to being distributed to shareholders or used for current expenses.
Government Savings
Funds accumulated by a government when it receives more money from taxes and other revenues than it spends.
Neuroticism Scale
A psychological measurement tool used to assess an individual's tendency towards emotional instability and anxiety.
Five-Factor Model
A theory in psychology, proposing that five broad dimensions underlie all human personality: Openness, Conscientiousness, Extraversion, Agreeableness, and Neuroticism.
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