I'm preparing IELTS exam and I got a problem with TASK 1 in writing part. I want to explain about a flow chart using 'synonym of flow chart' and the synonym was 'graph'. However, my English tutor said to me those are not synonyms at all. This is why I was getting confused what is the difference between the word 'flow chart' and 'graph'.
My question is this. Does the word 'graph' includes the definition (or meaning) of the word 'flow chart'? Or are they totally different words as my tutor mentioned earlier?