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3 = y₁
-1=x₂
-4=y₂
y - y₁ / y₁ - y₂ = x - x₁ / x₁ - x₂
y -3 / -4 - 3 = x - 2 / -1 - 2
y -3 / -7 = x - 2 / -3 ⇒ kali silangkan
-7 ( x - 2) = -3 ( y - 3)
-7x + 14 = -3y + 9
0 = -7x -3y + 14 + 9
-7x -3y + 23 = 0
( semoga benar dan membantu ,,,, kalau berkenan tolong di jadikan jwaban terbaik dong :D )