Question 120554
When two variables vary directly, it means they vary by a constant
ratio.

That is,
{{{y = k x }}}

where k is the constant ratio above.

The ratio, k, is found by solving for it :

{{{k = y/x}}}

Then, given the two values supplied:

{{{y = 36}}}, {{{x = 6,}}}

{{{k = 36/6 = 6}}}