We are going to sell harlem sweatshirts to raise money for
a end of course party. the machine to silk­screen the
sweatshirts costs $475. it also costs $13 for each plain
sweatshirt. we are planning to sell our sweatshirts for $28
each. how many harlem sweatshirts must we sell in order
to break even?

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.