Is it proportional or not

Question

The total cost (t) after 8percent sales tax is added to an items price(p):1:08p=t

Answer 1

What is the IT referring to in your question?

 

If you want to know is sales tax proportional to sales price, the answer is yes.

If you want to know is total cost proportional to the sales price, or to the tax, those answers are also yes.