Mathematics
Grand-Tests
Easy

Question


The average amount spent, in dollars, by each attendee at a conference from 2008 to 2010 is shown in the table. Which of the following quadratic functions best models the average amount spent f(x), by attendees at the conference from 2008 to 2010, where xis the number of years after 2008?

  1. f(x) = 10(x - 1)2 - 56
  2. f(x) = 10(x - 1)2 + 56
  3. f(x) = 10(x + 1)2 - 56
  4. f(x) = 10(x + 1)2 + 56

The correct answer is: f(x) = 10(x - 1)2 + 56


    From substitution option B

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