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Kelas : VIII
Pertama, cari gradien (m) nya.
Kedua, masukkan m ke rumus PGL melalui satu titik.
Jadi, persamaan garis b adalah x - y + 1 = 0.
Y-Y1/Y2-Y1=X-X1/X2-X1
Y-(-3)/3-(-3)=X-(-4)/2-(-4)
Y+3/6=X+4/6
Kalikan silang
6.y+3=6.x+4
6y+18=6x+24
6y=6x+24-18
6y=6x+6
y=6x+6/6
y=x+1
Gradien=1
Y-Y1=M(X-X1)
Y-(-3)=1(X-{-4})
Y+3=X+4
Y=X+4-3
Y=X+1
Y-X-1=0