A giant candy bar costs C dollars last week. This week the price doubled. How much would you pay today if you wanted 3 giant candy bars, and also had a $2 coupon off the total cost? Write this as an expression in terms of C. ​

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.