X+ 3 / 3 + x =
the numerator of the expression 3 − x / x − 3 can be written as
3 − x / x − 3 =

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.

The following relation is not a function