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Inverse variation equation

y = k/x where k is a nonzero constant and x does not equal 0

Inverse variation is when

the value of one variable (x or y) increases, while the value of the other variable decreases.

indirect variation

Inverse variation is also known as

k

constant of variation

equals k

the product of the variable

xy

= k

1/x

y =

5 = k / 3, k = 15

If x varies inversely as y when x = 3 and y = 5

12 = k / 4, k = 48

If x varies inversely as y when x = 4 and y = 12

Direct variation looks like

a line going through the origin (0,0)

Direct variation equation

y = k x