Question 469620
1 way:
 y varies inversely as x, so if x increase by 3 ({{{12/4=3}}}), then y decrease by 3
{{{y=27/3=9}}}
.
.
.

2 way:
if y varies inversely as x, then {{{y=k/x}}}, y=27 when x=4, so {{{27=k/4}}}=>{{{k=27*4=108}}}=> {{{y=108/x}}}
when x=12, then {{{y=108/12=9}}}