Tax owed: The income tax T owed in a certain state is a function of the taxable income I, both measured in dollars. The formula is T = 0.11I − 500 . a. Express using functional notation the tax owed...

Tax owed: The income tax T owed in a certain state is a function of the taxable income I, both measured in dollars. The formula is

T = 0.11I − 500 .

a. Express using functional notation the tax owed on a taxable income of $13,000, and then calculate that value.

 b. If your taxable income increases from $13,000 to $14,000, by how much does your tax increase?

c. If your taxable income increases from $14,000 to $15,000, by how much does your tax increase?