Akken ad nelmed tarrayt usemres n tasɣunin ad neṭṭef tasɣunt i isehlen akken ad neḥseb tasdest n useggas n unelmad ad nebdu s tasdest n tengatin am wakken i d-banen deg tfelwit –agi ( ad nexdem am wakken tanga tesɛa yiwen n amuskir (coefficient) • Ad d- nessebgen taxxamt deg ara d-iban ugemmuḍ • Ad nsenned ɣef teḥnaccaṭ i yellan rrif n ugraw tasenwurmant • Ad nextir tasɣunt i nebɣa ma tella deg umuɣ neɣ ad nsenned ɣef tesɣunt nniḍen sin akkin ad aɣ-d-iban usfaylu-agi: 69