Answer:
recommended when the graphics would make a report lengthy or the discussion complicated to follow.
Step-by-step explanation:
When making a report, it is likely that we would be inclined to using graphic material to expand on a discussion. However, if our use of graphics is very extensive, it could make the report too lenghty and complicated to follow. In this case, it would be best to place such graphic material in the appendix so that it does not get in the way of the report.