The flow of water from a faucet can fill 5 gallon container in 45 seconds. give the ratio of gallons to seconds as rate in gallons per second

(5 gallons) / (45 seconds) =

   (5 / 45) (gallon/second) =

     1/9    gallon per second

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.