The number of acres in the National Park system has grown from 78.1 million acres in 2000 to 85.77 million acres in 2013. Let y represent the number of acres, in millions, in the system and x the number of years after 2000. Find a linear equation that fits the data.

7 ft 6 in means 7 1/2, because 6 in is 1/2 of a foot. 7 ft 8 in means 7 2/3 because 8 in is 2/3 of a foot. 23/3 = 7 2/3. 15/2 = 7 1/2.

23/3   *   15/2   = 57 1/2

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answer: the correct answer is -32

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yes it represnts a functio, their are not 2 of the same numbers on the both sides