A picture frame is shaped like a rectangle whose perimeter is 140 cm. The length is 4 times as long as the width. Find the length and the width.​

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.