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January 29, 2015

January 29, 2015

Posted by **Sarah** on Monday, February 25, 2008 at 10:26pm.

If Y varies directly as X and Y = 12 when X = 3, find Y when X = 16

- Math -
**^Quen^**, Monday, February 25, 2008 at 11:11pmIf y varies directly with x, then there must be some number "k" such as:

y=k*x

Y = 12 when X = 3...So?

12=k*3

k=12/3

k=4

Since you found k, then you can plug in to find Y.

Y= 4*16

Y= 64

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