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Mathematics 8 Online
OpenStudy (anonymous):

Which of the following is not a function: A) x = 4y^2 - 5 B) 4sqrt(x). x is greater or equal to 0 C) (2,-3), (4,0), (3,-3) D) 4x^2 - 5

OpenStudy (baldymcgee6):

The test for a function is known as the vertical line test. In the vertical line test, the "function" must no touch the vertical line test in more than one spot at any instance.

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