Algebra, STD2 EQ-Bank 04 MC

The graph shows the tax payable against taxable incomes up to $60 000 in a proposed tax system.

How much of each dollar earned over $$30\,000$ is payable in tax?

Show Answers Only

$C$

Show Worked Solution

$\text{The gradient of line represents the tax payable per dollar.}$

$\text{Tax payable per dollar}:$

$= \dfrac{\text{rise}}{\text{run}}$

$= \dfrac{7000-1000}{60\ 000-30\ 000}$

$=\dfrac{1}{5}=0.20$

$\therefore\ \text{20 cents per dollar is payable in tax after }$30\, 000.$

$\Rightarrow C$