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24-12-2015
Mathematics

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If y varies directly with x, and y = 18 when x = 4, what is the constant of proportionality?

Respuesta :

tescoman1 tescoman1

25-12-2015

y is directly proportional to x and therefore takes the form y=kx where k is the constant of proportionality.

Dividing both sides by x for the given values, k becomes 18/4 = 4.5

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