Eliminate the parameter to find a Cartesian equation of the curve. 
Definitions:
Itemized Deductions
Potential reductions to income allowed for certain payments made during the tax year.
Taxable Income
The portion of one's income that is subject to taxes, determined by subtracting allowable deductions and exemptions from the gross income.
Taxable Income
The amount of an individual's or corporation's income that is subject to taxes, after deductions and exemptions.
Standard Deduction
A fixed amount that reduces the income on which you are taxed, which the IRS allows taxpayers to subtract from their gross income to reduce taxable income.
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