For inverse variation you'll have:
[tex]y = \frac{1}{x} k[/tex]
where k is the constant of proportionality
[tex]y = \frac{1}{x} k[/tex]
[tex]3 = \frac{1}{4} k[/tex]
[tex]k = 3 \times 4[/tex]
[tex]k =12[/tex]
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when x=6
y=?
Using the same equation you'll have
[tex]y = \frac{1}{x} k[/tex]
where k=12
[tex]y = \frac{1}{6} (12)[/tex]
[tex]y = 2[/tex]
