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OA ⇒ m=6/-4=-3/2
OB ⇒ m=6/6=1
OC ⇒ m=-3/6=-1/2
OD ⇒ m=-4/-2=2
OE ⇒ m=-4/-4=1
Gradien yang positif adalah OE, OD, dan OB.
Semangat!