In 1998, a single taxpayer used this tax schedule. Let x represent the single tax- payer's taxable income and y represent that taxpayer's tax. Express the tax schedule as a piecewise function.

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Schedule X- If your filing status is Single If the amount on Form 1040 line 39, is: Over- Enter on Form 1040 line 40 of the amount over- $0 25,350 61,400 128,100 278,450 But not over- $25,350 61,400 128,100 278,450 $0 25,350 61,400 128,100 278,450 15% $3,802.50 + 28% 13,896.50 + 31% 34,573.50 + 36% 88,699.50 + 39.6%