Suppose an amount increases by 100% then decreases by 100%. what’s the new amount?

The answer would be zero because your just taking the whole 100% away from the whole 100%.

100 kilometers per piles hour

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.