Question

select the correct equation for: y varies directly with x y = kx yk = x xy = k

Explanation:

Step1: Recall direct - variation formula

The formula for direct variation is $y = kx$, where $k$ is the constant of variation. This means that as $x$ increases or decreases, $y$ changes in proportion.

Step2: Analyze other options

The equation $yk=x$ can be rewritten as $y=\frac{x}{k}$, which is not direct variation. The equation $xy = k$ is inverse - variation.

Answer:

$y = kx$