## Linear Regression in Tableau. Part 2, Groups

Regression analysis is often used to study the relationship between two variables, such as budget and profit. In this article I will talk about how to find the regression lines of data groups, as well as create a tool to study the influence of some variables on others

## Linear Regression in Tableau, Part 1. Time Series

A linear regression model is used to describe the dependence of some dependent variable Y on variable X. Such models are often used to describe trends in quantities. Trends are tendencies of changes in quantities in mathematics, they can be described by linear, logarithmic, power and other equations. In addition, trends are also called charts that show the change in a certain value over time. This article will focus on linear trends.

## Parametric Portraits in Tableau

Math is beautiful!
The goal of the article is to show to Tableau users that math it is not only boring numbers and it is possible to describe anything by math equations and draw it.
It’s hard to imagine the dataset for the visualization of portraits contains only 2 values: 0 and 500. The portrait’s curves draw by using parametric equations for X and Y axes.