Examine Schedule Y-2. Let x represent the taxable income and y represent the tax.

a. What is the calculator keystroke sequence for an equation that models the tax on the interval over 37,450 but not over 75,600?
b. What is the calculator keystroke sequence for an equation that models the tax on the interval over 115,225 but not over 205,750?

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Schedule Y-2-If your filing status is Married filing separately If your taxable The tax is: income is Over- $0 9,225 37,450 75,600 115,225 205,750 232,425 But not over- $9,225 37,450 75,600 115,225 205,750 232,425 10% $922.50 +15% 5,156.25 + 25% 14,693.75 +28% 25,788.75 + 33% 55,662.00 + 35% 64,998.25 + 39.6% of the amount over- $0 9,225 37,450 75,600 115,225 205,750 232,425