###### Example2.2.1

A tax proposal is being considered in order to simplify income tax filing. The tax a person will pay depends on their amount of income.

Annual incomes of less than or equal to \(60\) (thousand dollars) are taxed at a flat rate of \(15 \%\text{.}\)

Annual incomes greater than \(60\) (thousand dollars) are taxed at \(15 \%\) for the first \(60\) then \(35 \%\) for any amount over \(60\) thousand dollars.

What piece of the graph do you use to calculate the income tax? It depends on the income. Of the two line segments, use the left one to calculate the tax for incomes up to \(60\) thousand dollars, and use the right segment to calculate the tax for incomes over \(60\) thousand dollars.