Posted by **Stephanie** on Wednesday, February 15, 2012 at 5:50pm.

I need some help with Direct linear variation.

I had tooken a test, and one of the questions on there said

" Which equation represents a direct linear variation?" The answers were

A ; y = 1/x

B ; y = x + 2

C ; y = x squared

D ; y = 1/2x .

I choose B . But now it says i got that wrong and the correct answer is D . How is that ?

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