Figure 21-16 
-Refer to Figure 21-16. The price of X is $5, the price of Y is $20, and the consumer's income is $40. Which point represents the consumer's optimal choice?
Definitions:
Superego
A part of the human psyche in psychoanalytic theory that represents internalized ideals and provides standards for judgment.
Id
Within the framework of psychoanalytic theory, it refers to the segment of the mind responsible for generating innate impulses and urging the instant gratification of basic desires.
Anxiety
A feeling of worry, nervousness, or unease about something with an uncertain outcome, often accompanied by physical sensations such as increased heart rate.
Unconscious Mind
The part of the mind that is beyond consciousness, harboring thoughts, memories, and desires that are not immediately accessible but influence behavior.
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