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02-09-2016
Mathematics

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Which of the following expressions represents a function?

{(1, 2), (4, –2), (8, 3), (9, –3)}

y2 = 16 − x2

2x2 + y2 = 5

x = 7

Respuesta :

03-09-2016

The first one is a function because their is only 1 y-value for every x-value.

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