Make a table that shows the additional tax owed over each income span.

Question

The table below gives selected entries from the 2009 federal income tax table. It applies to a married couple filing jointly. Taxable income and tax owed are both in dollars.

 

Taxable Income: $67,500  $67,600  $67,700  $67,800  $67,900  $68,000

Tax Owed:          $9,294    $9,309   $9,324    $9,339    $9,356    $9,381

                                                                                                          

Taxable Income: $68,100  $68,200  $68,300  $68,400  $68,500  $68,600

Tax Owed:         $9,406     $9,431   $9,456    $9,481    $9,506    $9,531

  

Make a table that shows the additional tax owed over each income span.

 

Taxable Income ($): 67,500  67,600  67,700  67,800  67,900  68,000
Tax Owed ($):          9,294    9,309   9,324    9,339    9,356    9,381

Additional Tax ($):                   ?           ?          ?           ?           ?
                                                                                                        
Taxable Income ($): 68,100  68,200  68,300  68,400  68,500  68,600
Tax Owed ($):          9,406    9,431   9,456    9,481    9,506    9,531

Additional Tax ($):        ?           ?         ?          ?           ?           ?

Answer 1

I think they're just asking for the difference in tax owed between each successive income span.  So the first ? would be 

 

9309 - 9294 = $15 

 

and the 2nd ? would be 

 

9324 - 9309 = $15 

 

and so on.  But be careful!  They're not all equal to $15.