The frequency table of favourite pizzas from the previous screen.
When you click on the table, the column headings disappear, and the column showing the frequency.
The tally marks turn into symbols of people. This is a pictogram.
One symbol is the same as 1 'gate' of five marks.
A horizontal bar grows along each row, so that the symbols are replaced by bars.
A scale appears along the bottom, numbered in fives from 0 to 30.
This is a bar chart.