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Jawab :
Tentukan Gradiennya
( 6 - 3 ) / ( 5 - ( - 2 ) )
m = 3/7
Dimisalkan :
y = 3/7x + c
Masukan x = - 2, dan y = 3
⇒ 3 = - 6/7 + c I ... × 7
21 = - 6 + 7c
- 7c = - 27
c = 27/7
Masukkan c ke persamaan awal
⇒ y = 3/7x + 27/7