Arectangle is 3 times as long as it is wide. if the area is 12 square feet find its perimeter.

Length=3*width
area=12
3W*W=12
w^2=4
w=2
l=6

perimeter=2(l+w)
                =2(2+6)
                 =16

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.