If y varies inversely as x, and y = 5 as x = - 2, find y for the x-value of 3.

Question

Augustus Orr

4 April, 21:34

+3

Answers (2)

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Mikaela Simmons · Answer 1

Y varies inversly as x means

y=k/x

k is constantt

find k

so

5=k/-2

times - 2 both sides

-10=k

y=-10/x

when x=3

y=-10/3

Bullwinkle · Answer 2

Since y varies inversely to x

xy = k

so 5*-2 = - 10

plug x and k into xy = k

-10 = 3y

divide both sides with 3

y = - 10/3 or - 3.3333