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30 August, 22:32

The value of y varies directly with the value of x, and y = 12 when x = 4.

Which equations represent the relationship between y and x?

Choose exactly two answers that are correct.

A. y/x=3

B. xy=3

C. x=3y

D. y=3x

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Answers (1)
  1. 31 August, 01:41
    0
    You can basically plug in the numbers for x and y into the options:

    A. y/x = 3

    12/4 = 3, so this one is right

    B. xy = 3

    12*4 = 48, so this is wrong

    C. x = 3y

    3*12 = 36, which is not x (4), so this is wrong

    D. y = 3x

    3*4 = 12, which is y (12), so this is right

    So, A and D are right
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