The table shows that marta's heart beat 18 times every 15 seconds, use equivalent ratios to complete the table. Explain how you found your time in 180 seconds

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.