正せい比ひ例れい

noun, noun or participle which takes 'suru', intransitive verb

direct proportion; direct ratio

Mathematical term for a relationship where one quantity increases or decreases in constant ratio to another. Often used with する to mean 'be directly proportional'.

• このグラフでは、xとyが正せい比ひ例れいしている。

  In this graph, x and y are directly proportional.

• 売うり上あげは広こう告こく費ひに正せい比ひ例れいして増ふえた。

  Sales increased in direct proportion to advertising expenses.