# Concept: Factor and Response[¶](https://knowledge.dataiku.com/latest/courses/statistics/univariate-bivariate/concept-factor-response.html#concept-factor-and-response "Permalink to this headline")

Assigning roles to variables in your data set determines how Dataiku DSS uses them in statistics cards.

In a bivariate analysis card, for example, if you assign a variable *alcohol* as a **Response**, and the variables *pH* and *sulphates* as **Factors**, the factors are used separately to explain the change in values of the response. The factors are plotted on the *x* axis and the response variable on the *y* axis.
