5 By the numbers . Using the following rate schedule for a progressive income tax, determine the percentage of gross income paid in tax for a household with incomes of

$25,000, $50,000, $75,000, $100,000, $200,000, and $500,000. Plot a graph of income on the horizontal axis and percentage paid in tax on the vertical axis.

Income ($) Tax rate From to (%)

0 20,000 0 20,001 40,000 5 40,001 60,000 10 60,001 80,000 15 80,001 100,000 20 100,001 150,000 25 150,001 200,000 30 Over 200,000 35