The tables to the right show recent state income tax SINGLE, MARRIED FILING SEPARATELY, OR schedules for individuals and married couples. HEAD OF HOUSEHOLD If taxable income is . . . Over But Not Over Tax Due Is $0 $15,000 3% of taxable income (A) Write a piecewise definition for the tax due T(x) on an $15,000 $30,000 $450 plus 6.05% of excess income of x dollars for an individual. over $15,000 $30,000 $1,357.50 plus 6.4% of .03x if O S x S 15,000 excess over $30,000 T( X ) = if 15,000