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• Math Help

Using a spreadsheet is an easy way to calculate a graduated income tax, as shown in Examples 1 and 2.

Also notice that the tax tables on pages 212 and 213 are for single taxpayers. The tables below show the graduated income tax for the taxable income (after deductions) of a married couple filing jointly or separately in 2010. Compare the rates with the single taxpayer table (also shown below). (See also Exercises 1-6.)

• Consumer Suggestion

Did you know that Hawaii is one of only two states, the other being Arizona, that does not observe daylight saving time? To learn more, visit webexhibits.org to view a neat interactive presentation all about daylight saving time.

• Checkpoint Solution

Use a spreadsheet to calculate the income tax owed.

The state income tax is \$16,378.60.

The effective tax rate is

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