-1 + 2x - x = x - 8 + (-x)

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.

If is was sunny on thursday, chances are that it will be a sunny if friday depending on the degrees and temperature. your welcome!