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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



Sagot :

[tex]y=-21~~~~~x=3 \\ \\ a)-7x=-7*x\rightarrow-7*3=-21~~(\boxed{\checkmark})~~because~~\boxed{y=-21}\\ \\ b) \frac{y}{x} =-7~~~~~ \rightarrow \frac{-21}{3}=-7 ~~ (\boxed{\checkmark})[/tex]