Post-Lesson Note: Observations (as discussed)
- Histogram is made up of vertical/column bars (we could not swap the axis)
- There is no gap between the bars
- The vertical axis is always "Frequency"
- The horizontal axis is a series of numbers - either discrete (i.e. 2, 3, 4, ...) or range (of equal class intervals) (i.e. 20<x<=30, 30<x<40).
- The numbers run in ascending order (they follow a certain order)
- The graph title is important for us to interpret the information in the histogram