Which scatterplot shows an outlier?
(ps. idk how to attach several images, but this is one of the graphs. so if you ever taken this test? )

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.