Direct Proportionality
Given two variables x and y, y is directly proportional to x (x and y vary directly, or x and y are in direct variation) if there is a non-zero constant k such that
The relation is often denoted, using the ∝ symbol, as
and the constant ratio
is called the proportionality constant or constant of proportionality.
Read more about this topic: Proportionality (mathematics)
Famous quotes containing the word direct:
“The shortest route is not the most direct one, but rather the one where the most favorable winds swell our sails:Mthat is the lesson that seafarers teach. Not to abide by this lesson is to be obstinate: here, firmness of character is tainted with stupidity.”
—Friedrich Nietzsche (1844–1900)