He momo hoahoa motuhake te kauwhata porowhita e whakamahi ana i te porowhita hei whakaatu i te rahi o ētahi rōpū raraunga. Ka wehea te porowhita ki ētahi pewanga hei whakaatu i te hautanga, te ōrau ranei o ia rōpū raraunga. Ko te rahi o te pewanga he rite ki te hautanga o te rōpū raraunga e hāngai ana. He pai tēnei kauwhata hei whakatairite i tētahi rōpū raraunga ki te katoa o ngā raraunga (TRP 2010:140). / A pie graph is a special type of diagram which uses a circle to show data. The circle is divided into sectors to show the proportion or percentage of each category of the data. This type of graph is useful for comparing the frequency of a particular category of the data with all of the data (TRP 2010:140).

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