Linus Nielsen Feltzing wrote:
> Mike Holden wrote:
>> But that's precisely what "proportional" means - linearly proportional!
>>
>> To be proportional, the two values have to be always at exactly the
same ratio, such as y = x * 2.
>
> Well, it can also be exponentially or logarithmically proportional, as
far as I know.

They can be related via a logarithmic or exponential scale (or cubic,
square, root, tan, cos, sine or whatever), but by definition, that isn't
proportional.

-- 
Mike Holden
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