noun Date: circa 1949 mathematical relationship between two variables that can be expressed by an equation in which one variable is equal to a constant times the other, an equation or function expressing ~
DIRECT VARIATION
Meaning of DIRECT VARIATION in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012