You can put this solution on YOUR website!
z is proportional to
so, the equivalent equation is
, where k is the constant of proportionality.
we need to know the value of k. To do this, we need to know x,y and z, which we do... so:
--> 6k = 64/4
--> 6k = 16
--> k = 16/6
--> k = 8/3
so, the equation is
Right, now for the question to find z when x=9 and y=2.
and now simplify these fractions to give...
--> z = 6