Direct Variation Calculator

Online calculators and formulas for calculating direct proportionality


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.


Proportionality calculator

  What should be calculated?
 Input
Variable x
Constant k
Variable y
Decimal places
  Result
Variable x
Constant k
Variable y

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'.

\(\displaystyle y=k ·x\)         \(\displaystyle x=\frac{y}{k}\)         \(\displaystyle k=\frac{y}{x}\)

\(x\)

independent variable

\(y\)

dependent variable

\(k\)

constant of proportionality


Absolute Change • All divisors of an integer • Average • Binomial formulas • Common divisors of two integers • Consecutive integers • Cross multiplication • Diamond problem • Digit sum • Digital root • Direct variation • Division with remainder • Elementary arithmetic • Factorial • FOIL Method • Inverse cross multiplication • Inverse modulo • Greatest common divisor • Least common multiple • Modulo • Multiplicative inverse • Relative Change


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