Explain why a 5 percent sales tax on gasoline is regressive. Ms. Jones has a taxable income of $30,000, and she must pay $3,000 in taxes. Mr. Smith has a taxable income of $60,000. How much tax must...

Explain why a 5 percent sales tax on gasoline is

regressive.

Ms. Jones has a taxable income of $30,000,

and she must pay $3,000 in taxes. Mr. Smith

has a taxable income of $60,000. How much

tax must Mr. Smith pay for the tax system

to be

a. progressive?

b. regressive?

c. proportional?