-2 is less than or equal to x, and x is less than or equal to 9

Idon’t know this and this isn’t middle school work

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.