Scatter plots

A scatter plot shows the relationship between two variables in a Cartesian coordinate system. The position of each data point is determined by the values of these two variables. The scatter plot can provide hints of any correlation between the variables under study. An upward trending pattern suggests positive correlation. A bubble chart is an extension of the scatter plot. In a bubble chart, the value of a third variable is represented by the relative size of the bubble surrounding a data point, hence the name.

At http://en.wikipedia.org/wiki/Transistor_count#GPUs, there is a table with transistor counts for Graphical Processor Units (GPUs).

GPUs are specialized circuits used to display graphics efficiently. Because of the way modern display hardware works, GPUs can process data with highly parallel operations. GPUs are a new development in computing. In the gpu_transcount.csv file in this book's code bundle, you will notice that we don't have many data points. Dealing with...