Paige has to make invitation cards for a party. If she can make 18 cards in 2 days, how many can she make in 30 days.

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.