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y - 10 / 1 - 10 = x - (-2) / 1 - (-2)
y - 10 / -9 = x + 2 / 3
3y - 30 = -9x - 18
3y + 9x = -18 + 30
3y + 9x = 12
y + 3x = 4
masukkan nilai x di titik A
y + 3(3) = 4
y + 9 = 4
y = 4 - 9
y = -5
y2-y1 x2-x1
= y - 10 =3 - (-2)
1- 10 1 - (-2)
= y-10 = 5 = 3(y-10)=5 x (-9)
-9 3
= 3y - 30 = - 45
= 3y = -45 + 30
= 3y = -15
= y = -15 =
3
= y = -5 (B)
semoga bermanfaat ..:)
maaf jika salah :)