Ko te ahunga whānui o tētahi āhuatanga i te takanga o te wā, pēnei i te taupori o tētahi wāhi, mēnā e piki ana, e heke ana, e panoni pēhea ana rānei.
The general direction of something over time, such as the population of a particular place, whether it is increasing, decreasing or showing some other sort of broad change.
ia - current, flow
He pēhea nei te ia o te pikiutu tukipū i te tau kua pahure nei?
E tino kitea ana te ia o ngā utu kai i te kauwhata rārangi nei.
Ka pāhotia ngā ia hou o te wā ki runga i ngā pae pāhopori.