# How do you write an inverse variation equations given y = 3 when x = 7?

Mar 13, 2016

Inverse variation is of the form $x \times y = \text{constant}$
Or $y = \frac{\text{constant}}{x}$
The constant here is obviously $3 \times 7 = 21$
$x \times y = 21$ or $y = \frac{21}{x}$