Posted by **gavyn** on Wednesday, January 14, 2009 at 8:59pm.

i have a homework assignment i do not know how to do. i was out sick so i have not learned this. hear is the question......y varies directly as x. find the constant of variation and write an equation for the direct variation.

question 1: y=15 when x=5

- 8th grade -
**bobpursley**, Wednesday, January 14, 2009 at 9:03pm
direct variation:

y= kx where k is the constant of variation.

15=k*3 find k.

- 8th grade -
**John**, Thursday, January 15, 2009 at 1:26pm
y=kx

y=15

x=5

Shouldn't it be 15=k*5?

- 8th grade -
**Anonymous**, Monday, October 22, 2012 at 7:37pm
The anwser is y=3x

Becasue all you doing is divding 15 dy 5 to get k

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