Triangle LMN with vertices L(6,6) M(8,8) and N(8,3) a) reflection in the line x=5
b) 270 degrees counterclockwise rotation about the origin.

The major difference is that a histogram is only used to plot the frequency of score occurrences in a continuous data set that has been divided into classes, called bins.  bar charts, on the other hand, can be used for a great deal of other types ofvariables  including  ordinal  andnominal  data sets.