Now, suppose you know someone's "new" number. Can you determine what number he or she started with? As you answer the following questions pay close attention to the order of operations you follow. Untried Mary's new number was 22.8. What was her original number? Jackson's new number was 14.3. What was his original number? Which of the following represents the general process for taking any "new" number y and finding the original number x used to generate it? f 1 ( y ) = 3 ( y + 7 ) where f 1 ( y ) = x f 1 ( y ) = y 3 + 7 where f 1 ( y ) = x f 1 ( y ) = y + 7 3 where f 1 ( y ) = x f 1 ( y ) = 3 y + 7 where f 1 ( y ) = x