Chana pays $7.35 per pound for up to19 pounds of beads. For more than 19 pounds, she pays $5.35 per pound. Is the amount Chana pays a function of the weight of the beads she buys? Explain your reasoning.

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.