The symbol is the greek letter alpha which looks kinda like a Jesus fish
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Proportionality is a rational or ratio property. Ratios are expressed with a colon. [:] Direct proportionality would be expressed as 1:1
It is an expression, not an equation and so cannot be proportional nor non-proportional.
Directly proportional relationship is F=ma, F is directly proportional to a. Inversely proportional relationship is v=r/t, v is inversely proportional to t.
Disproportional.If instead you're looking for the antonym of directly proportional, that would be inversely proportional.
Your question is incomplete... proportional to WHAT?