If you had 1 cup of heavy cream would you need 2 cups of milk to equal the weight i am just curious have a good day

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.