Briannalyse Briannalyse

25-07-2015
Mathematics

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the variables x and y are inversely proportional, and y=2 when x=3 what is the value of y when x=9

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25-07-2015

Inverse proportion:
[tex]xy=k[/tex]

y=2 when x=3.
[tex]3 \times 2=k \\ k=6 \\ \\ xy=6[/tex]

y=? when x=9.
[tex]9y=6 \\ y=\frac{6}{9} \\ y=\frac{2}{3}[/tex]

y=2/3 when x=9.

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