3. The amount paid on sales tax depends on the price you pay for an item. If you pay $10 for an item, you will pay $0.90 in sales tax. a. Complete the table, and then use it to draw a graph, where x is the price you pay and y is the sales tax paid. Item Price Tax Paid 0 10 20 30 40 b. Is this a direct variation relationship? Why or why not? Be specific. c. Find the slope of the line you graphed and explain what it means. d. Write a linear equation that describes the tax paid (y) in terms of the item price (x). e. What is the price of an item if the sales tax for that item is $15.80