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March 9, 2014

# Homework Help: Math

Posted by Gaby on Wednesday, May 20, 2009 at 2:26pm.

Suppose y varies directly with x and y=12 when x=6. Write an equation realting x and y.

• Math - Reiny, Wednesday, May 20, 2009 at 2:42pm

when you have a statement such as
"Suppose y varies directly with x "

you can write it as y = kx, where k is some constant.
In most cases you will be given one relations that let's you find the value of k, sure enough: x=12 and x=6

so 12 = k(6)
k = 2

then your equation will be y = 2x

• Math - Gaby, Wednesday, May 20, 2009 at 2:44pm

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