Direct variation

Mathematics

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Direct variation (1)

The relation between two variables

Direct variation (2)

When variable y increases then variable x also increases

Direct variation (3)

Increases or decreases at the same rate

Graph of y against x (1)

Value of y/x is a constant

Graph of y against x (2)

Variable y varies directly as the variable x

Constant

Fixed or unchanged quantity value

Constant of proportionality, k

Quantity y is said to be varied directly as x if and only if y/x is a constant

Variation relation

y varies directly as x

Equation form

y varies directly as x

x and y are directly proportional

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