Which expression is equivalent to
(5^-2)(5^-1)
A. -1/125
B. -1/5
C.1/125
D.1/5

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.