Question

1. which is the inverse variation equation?

$y = kxz$
$y = \frac{k}{x}$
$y = kx$
$y = \frac{kx}{z}$

Explanation:

Inverse variation means one variable is inversely proportional to another, following the form $y = \frac{k}{x}$ where $k$ is a constant. The other options represent joint variation ($y = kxz$), direct variation ($y = kx$), or combined variation ($y = \frac{kx}{z}$), not inverse variation.

Answer:

$y = \frac{k}{x}$