Respuesta :

caylus
Hello,
z=k/(xy), if x=2 and y=4 then z=1/2
==>1/2=k/(2*4)==>k=8*2==>k=4

meerkat18
We represent this indirect variation by,
                                  z = k/xy
where k is the constant of the variation.
Substituting the first set of values for the variables,
                            0.5 = k/(2 x 4)       ; k = 4
Now for the second set,
                             z = 4/(4 x 9)         ; z = 1/9
Thus, the value of z is 1/9.