variation

Variation and proportion are defined to be the relationship between two or more variables with regard to a constant of proportionality.

The traditional notation for direct proportionality is $x\\propto y$ or, if using regular equality notation, $x=ky$ .

Here, $k$ denotes the constant of proportionality.

Similarly, the traditional notation for inverse proportionality is $x\\propto 1/y$ or, with regular equality, $x=k/y$ .

For direct proportionality, to find the value of an unknown $x$ or $y$ , you may use the formula: $y_{1}/x_{1}=y_{2}/x_{2}$

Similarly, for inverse proportion it would be: $x_{1}/y_{1}=y_{2}/x_{2}$

单词	Variation
释义	variation Variation and proportion are defined to be the relationship between two or more variables with regard to a constant of proportionality. The traditional notation for direct proportionality is $x\\propto y$ or, if using regular equality notation, $x=ky$ . Here, $k$ denotes the constant of proportionality. Similarly, the traditional notation for inverse proportionality is $x\\propto 1/y$ or, with regular equality, $x=k/y$ . For direct proportionality, to find the value of an unknown $x$ or $y$ , you may use the formula: $y_{1}/x_{1}=y_{2}/x_{2}$ Similarly, for inverse proportion it would be: $x_{1}/y_{1}=y_{2}/x_{2}$
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