LineGraph[g] gives the line graph of the graph g.
PathGraphQ[g] yields True if the graph g is a path and False otherwise.
PlotLabel is an option for graphics functions that specifies an overall label for a plot.
ReliefPlot[array] generates a relief plot of an array of height values.
ScalingFunctions is an option for BarChart, Histogram, and other charting functions that specifies what scaling functions should be used.
SimpleGraphQ[g] yields True if the graph g is a simple graph and False otherwise.
SquareWave[x] gives a square wave that alternates between +1 and -1 with unit period.SquareWave[{y_1, y_2}, x] gives a square wave that alternates between y_1 and y_2 with ...
TreePlot[{v i 1 -> v j 1, v i 2 -> v j 2, ...}] generates a tree plot of the graph in which vertex v_ik is connected to vertex v_jk.TreePlot[{{v i 1 -> v j 1, lbl_1}, ...}] ...
VertexCoverQ[g, vlist] yields True if the vertex list vlist is a vertex cover of the graph g, and False otherwise.
VertexSize is an option and property for Graph and related functions that specifies the size used for vertices.