Direct Variation Calculator

Enter the constant of variation and x point along a line into the direct variation calculator. The calculator will display the direct variation in y.

Direction Variation Formula

The following formula is used for calculating a direction variation.

C = X/Y


  • Where C is the constant of direction variation
  • X and Y are coordinate points.

In this case the form y= cx is also the point slope form of a line. Just as with the line form, i direct variation may have a constant b, associated with it.

Direct Variation Definition

A direct variation is defined as the relationship between two dependent variables. That is each variable depends on the other.

How to calculate direct variation?

How to calculate direct variation?

  1. First, determine the constant of direct variation.

    This is C is the formula above.

  2. Next, determine one of the coordinate points of x or y.

    Determine the value of one variable.

  3. Finally, calculate the missing variable.

    Using the formula above, calculate the missing variable using direct variation.


What is a direct variation?

A direction variation is a relationship between two variables. Typically this is described in the form of a line equation like y=cx, where c is the direct variation constant.

When can direction variation be used?

Direction variation can be used in any situation that involves one or more variables. For example, if you have two variables A and B that are directly related, then you can figure out their values at any point in time. Let’s say for every point A increase B increase 2 points. This means that if A=4 then B =8.

direct variation calculator
direct variation formula