Can somebody help me with this question please ?

Cd is the perpendicular bisector of both xy and st, and cy=20.find xy

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.