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2 January, 04:45

Y and x have a proportional relationship, and y = 9 when x = 2. What is the value of y when x = 3?

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  1. 2 January, 04:56
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    Correct formula is y = kx, where k is the "constant of proportionality."

    If y = 9 when x = 2, then 9 = k (2), or k = 9/2.

    Then y = (9/2) x.

    If x = 3, y = (9/2) (3) = 27/2 (answer)
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