{(-5, -5), (3, 10), (7, 14), (3,9)}
Is this relation a function

Ithink it should be 55.

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.