Which of these strategies would eliminate a variable in the system of equations? 2x + 8y = -3
3x + 6y = -4

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.