This is the question of Direct and Inverse Variation
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where is the question ???????
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direct means if we take the big one when it is compare it's cost or something then we use x1/y1=x2y2
inverse means it is low when compare to first of the cost or something then we use x1*y1=x2*y2
inverse means it is low when compare to first of the cost or something then we use x1*y1=x2*y2
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