Combine the like terms, if any. 3x + 2y + 2 - X - 4* 4xy - 2
2x+2y-2
4x + 2y +6
11xy - x

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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.