This attribute determines the line style used when drawing each
element of graphical output produced by a PlotPlot. It takes a
separate value for each graphical element so that, for instance,
the setting "Style(border)=2" causes the Plot border to be drawn
using line style 2 (which might result in, say, a dashed line).
The range of integer line styles available and their appearance
is determined by the underlying graphics system. The default
behaviour is for all graphical elements to be drawn using the
default line style supplied by this graphics system (normally,
this is likely to give a solid line).