Arabbit's fur grows at the rate of 5 over 2 inches per month.
how many months will it take the rabbit's fur to grow 15 over 4 inches?

(15/4) / (5/2) = 
15/4 * 2/5 =
30/20 =
3/2 = 1 1/2 months 

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.