Eliminate the parameter to find a Cartesian equation of the curve. 
Definitions:
Gini Coefficient
A measure of income inequality within a population, ranging from 0 (perfect equality) to 1 (perfect inequality).
Second Poorest Fifth
A reference to the quintile in a distribution of income or wealth that is second from the bottom, denoting the group with more resources than only the poorest fifth but still below the majority.
Well-Being
The state of being comfortable, healthy, or happy, reflecting the overall quality of life.
Well-Being
A comprehensive measure of an individual's overall health, happiness, and life satisfaction.
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