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Home > PC3 > Chapter 12 > Lesson 12.1.5 > Problem 12-81


If a sales tax is charged on any purchase, then the amount of sales tax varies directly as the purchase price.

  1. Express the sales tax as a function of the purchase price .

    Change the % to a decimal.

  2. What are the parts of your algebraic expression for and what do they represent in this situation?