Direct variation.
In mathematics, two quantities are proportional if they vary in such a way that one of them is a constant multiple of the other.
In mathematics, two quantities are in the golden ratio if their ratio is the same as the ratio of their sum to the larger of the two quantities.
ratio
The ratio between two different quantities is the rate.Usually, the second unit is a measure of time.
Proportional
The answer is proportional.
Two quantities are said to be proportional if they vary in such a way that one of the quantities is a constant multiple of the other, or equivalently if they have a constant ratio.
The corresponding sides of similar solids have a constant ratio.
It is a direct proportion.
Two variables whose ratio is constant have a linear relationship. The first variable is the second multiplied by the constant.
Direct variation.
A linear relationship
It is called direct variation.
In mathematics, two quantities are proportional if they vary in such a way that one of them is a constant multiple of the other.
It is called the constant of proportionality.
The relationship is a linear one. For example when driving at a constant speed, the relationship between distance driven and the time driven is linear with a constant ratio (of the constant speed).