How do you know whether a graph represents a linear relation?
When we choose points on a grpah to substitute their coordinates in an equation, what is an advantage of choosing the points where the graph intersects the axes?

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.