# If #xy = −25# what is the constant of variation for this relationship?

##### 1 Answer

Jun 22, 2015

The constant of variation is **inverse variation**

#### Explanation:

The constant of variation is the number that relates two variables.

To know what the constant of variation is, you first have to identify what type of variation is occurring: *direct* or *inverse*.

The formula for direct variation is:

The formula for inverse variation is:

Since the question matches for formula for inverse variation, we know that that's the type of relationship. In both equations, k is the constant of variation.

So it's important to identify the type of variation and the value of k in order to understand the relationship.