semperfilove
y varies directly as x. When y = 15, x = 4. Find the constant of variation and use it to determine the value for y when x = 6.



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Hope_nicole
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set it up as a proportion.

semperfilove
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Then, wouldn't you do cross mulitply & divide ?

Hope_nicole
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dw:1364319403425:dw

SerikMB
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y=k*x

SerikMB
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k is a constant that vary

SerikMB
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15=k4, k=4/15, then use it in the y=4/15*6


Softballgirl372015
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then you do 15/4 * 6

SerikMB
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yep, sorry wrong calculation