The sum of two integers is -61 and the difference is -143. what are the two integers?

-61 + (-143) = -204

Add them both, I suppose. 

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.