Direct Variation Calculator

This function calculates the constant of proportionality 'k' for direct proportionality, the independent variable 'x' or the dependent variable 'y'.

Use the radio button to select which value should be calculated and enter the known values. Then click on the 'Calculate' button.

Description and formula for proportionality

Proportional sizes are related; that is, with the proportional quantities x and y, the doubling or halving of quantity x is always associated with a doubling or halving of quantity y. The ratio of x : y is called the proportionality factor or constant of proportionality 'k'.

x	independent variable
y	dependent variable
k	constant of proportionality