Question

Here are the prices of some items a nd the amount of sales tax charged on each in Nevada. What is the sales tax rate in Nevada?

Answer 1

The sale tax rate is equal to the ratio of change in sales tax to the corresponding chane in cost of item.

Determine the sales tax rate.

`\begin{gathered} s=(2.30-0.46)/(50-10) \\ =(1.84)/(40) \\ =0.046 \end{gathered}`

So sales tax rate is 0.046 or 4.6% of cost of item.