the variables x and y vary directly.Use the given values to write an equation that relates x and y.x=3, y=9?

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2006-12-02 05:01:36 · 3 answers · asked by resey720 1 in Science & Mathematics ➔ Mathematics

Ratio:
y ........... x
9 ........... 3

y = 9x/3

y = 3x

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2006-12-02 05:11:52 · answer #1 · answered by Luiz S 7 · 0⤊ 0⤋

since x is directly propotional to y then x=ky were k is constant..
or x square=y
so the final answer is x square = y

2006-12-02 13:10:48 · answer #2 · answered by shrutesh 1 · 0⤊ 0⤋

y=kx
9=3k
k=3
so y=3x

2006-12-02 13:03:12 · answer #3 · answered by raj 7 · 1⤊ 0⤋