In 1950 the Number of Retirees Was Approximately 150 Per $t$

question 97

Short Answer

In 1950 the number of retirees was approximately 150 per thousand people aged 20-64. In 1990 this number rose to approximately 200, and it is projected to rise to 275 in 2020. Model ​N as a piecewise linear function of the time $t$ in years since 1950, and use your model to project the number of retirees per thousand people aged 20-64 in 2009.
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Please enter your answer as a number without the units. Round your answer to the nearest integer.

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Definitions:

Distinctiveness

The quality or characteristic of being easily distinguishable from others due to unique features or attributes.

Highly Incongruent

Refers to situations or stimuli that are vastly inconsistent or contrasting with expected norms or patterns.

Super-Ego

In psychoanalytic theory, the part of the personality that acts as a moral center, guiding behavior according to learned societal standards.

Psychosexual Stages

A theory by Freud describing how personality develops through five stages from infancy to adulthood, centered on sexual pleasure.