Author: Matt Carter at Credible.com

Fact: One type of chart about which the GMAT DI can ask is a bubble chart. What in Sam Hill is a bubble chart?   Scatterplots A bubble chart is a close cousin to a scatterplot.  In a scatterplot, each data point has values in two different variables, and for each data point, its vertical…

One reason we graph data in a scatterplot is because we are looking for patterns.  The simplest of all possible patterns to find on a scatterplot is a straight line pattern. Correlation When the points on a scatterplot lie more or less in a straight-ish line, that is called correlation.  When it’s a straight line…

Fact: One common way data will displayed on GMAT Data Insights questions is in bar charts. This post is a whirlwind overview of what you need to know about the varieties of bar charts in order to be successful with them on the new DI section.   Bars & Columns Some sources call a graph…