also: ぎゃくひ
noun
inverse ratio
Mathematical term for the relationship where one quantity increases as another decreases proportionally. Often used in technical contexts.
速度と時間は反比の関係にある。
Speed and time are in inverse proportion.
このグラフは反比を示している。
This graph shows an inverse ratio.
Compound of 反 (anti-, opposite) and 比 (ratio). The reading はんぴ follows standard on'yomi. The variant 逆比 uses 逆 (reverse) with reading ぎゃくひ, but is considered irregular.