At Store A, a game system sells for $150.The same system sells for $175 at Store B. Use a ratio to compare the price at Store A to the price at Store B.

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.