U. S. Postal Rates- Use the following table to decide if the relationship between the weight of first class mail for shipping a package from Gresham, OR to Albuquerque, NM and the cost is a function. Explain how you decide in complete sentences. U. S. POSTAGE RATES FIRST CLASS MAIL Between Gresham, OR and Albuquerque, NM Weight (oz) Cost ($) Weight (oz) Cost ($) 1 1.17 7 2.19 2 1.34 8 2.36 3 1.51 9 2.53 4 1.68 10 2.70 5 1.85 11 2.87 6 2.02 12 3.04