The "Nut Graph" is known as the paragraph that helps to put the story in context, provides any additional information that may be useful for the reader and that can lead to a better understanding of it.
The Nut Graph is often the third or fourth paragraph of the news story and the information that contains is always related to how the context affects the reader and the story as well.
In journalism, it is used when the writer considers that the reader will need more context in order to understand why, what, who and how it happened, without really saying it, because this answers are normally given during the first and second paragraph.
Answer:
He should use a bar graph because it seems more pratical for what he is doing.
Read the excerpt from Part 2 of The Odyssey by Homer.
We would entreat you, great Sir, have a care
for the gods' courtesy; Zeus will avenge
the unoffending guest.'
He answered this
from his brute chest, unmoved
'You are a ninny,
or else you come from the other end of nowhere,
telling me, mind the gods! We Cyclopes
care not a whistle for your thundering Zeus
or all the gods in bliss; we have more force by far.