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23 February, 22:17

The value of y varies directly with the value of x, and y = - 21 when x = 3.

Which equations represent the relationship between y and x?

Choose exactly two answers that are correct.

A.-7x=y

B. y/x=-7

C. x/y=7

D. xy=-7

if it says y/x or x/y then its a fraction

+5
Answers (2)
  1. 23 February, 23:02
    0
    If you plug in y=-21 and x=3 into each answer choice, you'll find the answer.

    A) - 7 (3) = - 21 True

    B) - 21/3 = 7 True

    C) 3/-21 = 7 False

    D) 3 x - 21 = - 7 False
  2. 23 February, 23:43
    0
    A. - 7x=y

    Because if you multiply - 7 by x. - 7 x 3 = - 21. - 21 is your y term

    B. y/x=-7

    Because if you divide Y by X. - 21/3=7
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Home » Mathematics » The value of y varies directly with the value of x, and y = - 21 when x = 3. Which equations represent the relationship between y and x? Choose exactly two answers that are correct. A.-7x=y B. y/x=-7 C. x/y=7 D.
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