Graph

In the mathematical discipline of graph theory, the line graph of an undirected graph G is another graph L that represents the adjacencies between edges of G.

In graph theory, a circle graph is the intersection graph of a set of chords of a circle.

Graphs are extremely powerful tools for displaying large quantities of complex data. A graph which misrepresents data is called misleading graph.

In statistics, a histogram is a graphical representation of the distribution of data. It is an estimate of the probability distribution of a continuous variable and was first introduced by Karl Pearson.

A Cartesian coordinate system is a coordinate system that specifies each point uniquely in a plane by a pair of numerical coordinates, which are the signed distances from the point to two fixed perpendicular directed lines, measured in the same unit of length.