The federal income tax is not the dominant form of taxation by the federal government A, true B. False QUESTION 2 The largest source of federal revenues is the individual income tax A. true B. False QUESTION 3 Arthur pays tax of $5,000 on taxable income of $50,000 while Barbara pays tax of $24,000 on $120,000. The tax is a: A. regressive tax B. proportional tax C. none of the above D. progressive tax