Wrth gasglu a chofnodi data, gelli di eu cynrychioli mewn diagram. Gan ddibynnu ar y canlyniadau, gelli di ddefnyddio siart bar, siart cylch, graff llinell, pictogram, diagram amlder neu ddiagram ...

A pictogram uses pictures or symbols to represent data or information. Each picture represents a number of items, making the data clear and easy to read. The title of the pictogram tells us what ...