Please help I don't how to calculate the equation from the graph

This a very hard question about this place and this company does the right thing and the company always makes you think you can do what black

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.