The tables on the following website show the average federal tax rate rates between 1979 and 2015 for various income levels. NOTE: a quintile represents 20% of the population. In this case, the lowest quintile represents the poorest 20% of the population, the second quintile the second poorest 20% of the population, and the highest quintile is the richest 20% of the population.https://www.taxpolicycenter.org/statistics/historical-average-federal-tax-rates-all-householdsPlease look at the average individual tax rate for 2015. Which of the following is correct?- the individual income tax is regressive- the individual income tax is progressive- the individual income tax is proportional- none of the above

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