Mēnā he pānga rārangi kei waenganui i ētahi taurangi e rua, ā, ka whakaaturia ki te kauwhata, he rārangi torotika te āhua o te kauwhata (TRP 2010:195). / If there is a linear relationship between two variables and the relationship is shown on a graph, the graph will be a straight line (TRP 2010:195).

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