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Mathematics 19 Online
OpenStudy (anonymous):

x (years since 1991) 2 5 7 8 y (book sales billions $) 18 21 23 24 Using the equation for this table and linear extrapolation, predict the book sales, in billions of dollars, in 2010, using data from the previous question. (Note that x is the number of years after 1991.) 35 billion 48 billion 72 billion

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