When a 30 foot piece of rope is cut into 10 sections, each piece is 3 feet long. Imagine cutting it into more pieces or fewer pieces. Is the relationship between the number of pieces and the length of each piece, a direct variation or an inverse variation?​

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.