Mr. Aškinson spends a total of $47 to buy some packages of art pencils and some erasers for his class. The pencils cost $8 per package, and he spends $7 on erasers.
Complete the equation that could be solved to find the number of packages of pencils, n, Mr. Atkinson buys.

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.