Question 329214: A brief explanation for the meaning -y is directly propotional to x (give an example)
Answer by nyc_function(2741)   (Show Source):
You can put this solution on YOUR website! When two variable quantities have a constant (unchanged) ratio,
their relationship is called a direct variation.
It is said that one variable "varies directly" as the other.
The constant ratio is called the constant of variation.
The formula for direct variation is y = kx,
where k is the constant of variation.
"y varies directly as x"
In a direct variation, the two variables
change in the same sense. If one increases, so does the other.
Example:
The weekly salary Rita earns, R, varies directly as the number of hours, h, which she works. Express this relation as a formula.
R = hk
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