Answer:
There are many ways to represent a set of Quantitative Data, either Pictorially or Through Bar graph, line graph ,dot plot or with the help of tally marks.
When data is represented through pictures
If you are trying to represent number of vehicles sold in a country in a year can be represented by drawing the picture of that vehicle in front of each month.
Suppose A family uses approximately 5 Kg of food items every day for it's consumption, and 35 kg every week, 150 kg in a month and 1830 Kg in a year, this can be represented through any of food quantity in terms of picture graph.
When you talk about parts of a picture graph, it totally depends on which kind of picture it is.It totally depend on your choice , that is the way you represent that thing.
In mathematical terms, it can be any geometrical shape, like, quadrilateral ,any polygon , circle, or any three dimensional shape.
