My brother grew 1.75 inches in 2.5 months. if he continues to grow at the same rate how much should he grow in one year?

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.