College Debt The following graph shows the average debt, in constant 2007 dollars per borrower, of college students upon graduation. a. According to the graph, between which two years did the average debt decrease? b. If the increase between 2007 and 2008 is the same as the increase between 2006 and 2007, what will be the average debt in 2008?

1.1 The Basics of Algebra A. Evaluate B. Translate C. Number sets ● Real Numbers ○ Rational: You know exactly which digit comes next, ex: ⅓ = . 3333... ■ Integers ● Whole numbers: 0, 1, 2, 3, 4... ● Natural numbers: “a subset of whole numbers” ex: 1, 2, 3, 4, 5… ■ Nonintegers ● Ex: 4.7, ¾ ○ Irrational: You do NOT know what digit comes next, ex: , √2 ∈ = element of ⊂ = subset of ∉ = not