Find the slope-intercept form of the equation of the line tangent to the graph of 
when 
.
Definitions:
Marginal Utility
The incremental utility or enjoyment gained from the consumption of one more unit of a good or service.
Opportunity Cost
Forgoing the chance to gain from other possibilities by selecting one option.
Consumer Behavior
The study of how individuals, groups, and organizations select, purchase, use, and dispose of goods, services, ideas, or experiences to satisfy their needs and desires.
Marginal Utility
The added value or satisfaction experienced upon consuming an additional unit of a good or service.
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