Determine whether or not the situation describes a function. give a reason for your answer. the amount of federal income tax you pay is a function of your taxable income. a. no, it is not a function. for a specific income, you pay only one tax amount. b. yes, it is a function. at the end of the year, you will have two different tax amounts. c. no, it is not a function. every year, you pay a different amount of tax. d. yes, it is a function. for a specific taxable income at the end of the year, you will pay only one income tax amount.