The average monthly amount Isabella has spent on gasoline since 1990 is shown in the table. A 2-column table with 7 rows. The first column is labeled year with entries 1990, 2000, 2005, 2006, 2007, 2008, 2009. The second column is labeled average amount (dollar sign) with entries 23, 135, 199, 207, 215, 228, 245. Use the data in the table to complete the statements. Let x be the number of years since 1990. The year 2005 corresponds to an x-value of. The function that best models the data, with numerical values rounded to the nearest hundredth, is f (x) = x + 22.08. Models have their limitations. For which year would this model not make sense to use?
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