What is the difference between graph and chart?

Basically, there are many different types of chart. A graph is just one of thse types.

Have a look here. http://en.wikipedia.org/wiki/Chart

In my experience, the word 'diagram' is a lot more common than the word 'chart'.

Students: Are you brave enough to let our tutors analyse your pronunciation?

As per the earlier answer, the major classification under Chart could be "data driven graphs" (based on numerical values) and "conceptuals" (visual layout derived from a set of text on the basis of some logic e.g., org chart, Pyramid layout, RoIC tree and so on.

me confused
Teachers: We supply a list of EFL job vacancies
Surely this isn't true. There used to be line graphs, bar graphs etc. Somehow chart has superceded graph.

Diagrams are something else again.