y=72 , x=3

When two variable quantities have a constant ratio, their relationship is called a direct variation. It is said that one variable varies directly as the other. The formula for direct variation is y=kx, where k is the constant of variation.

y=kx

Solve the equation for k, the constant of variation.

k=yx

Replace the variables x and y with the actual values.

k=723

Divide 72 by 3.

k=24

Find the Constant of Variation y=72 , x=3