What are frequency histograms and cumulative frequency graphs?
This post will explain frequency histograms and polygons, along with cumulative frequency graphs and how to construct them all in Prelim Standard Math.
How to construct a frequency histogram
The videos below explain how to construct a frequency histogram from a set of data.
How to construct a cumulative frequency graph
The following video explains how to construct a cumulative frequency graph and further how to calculate the median of the data given from this.