Given a question,
Write down an equation that embodies the following relationship
$$ a \varpropto b $$
Does the 'open' end of the $\varpropto$ symbol indicate that that's the side of the equation which needs a constant of proportionality, and hence
$$ a = bC $$
would be a correct answer, but
$$ aC = b $$
would be a wrong answer, or is there something more subtle that I've missed?