Find at least common denominator of 5/6 and 7/9

18.

Explanation: Make a table of the multiples of 9 and 6. You will see that the lowest multiple they share is 18. This would mean 5/6 is now 15/18 and 7/9 is now 14/18

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.

Ibelieve that c. recording would work best.