A Direct and Inverse Variation Functions Question

Geometry Level 2

In the picture above, which of these's 'y' is not 'x''s function?

C D A B

Isabella Yan by Isabella Yan , 19, China

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3 solutions

Kenneth Gravamen
Sep 5, 2015

Vertical line test.

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Caleb Townsend
Mar 4, 2015

D D fails the vertical line test, that is it has more than 1 1 possible value of y y for some x . x. It is therefore not a function. The others are all functions in the domains given.

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Isabella Yan
Mar 2, 2015

D: It doesn't make sense!

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