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y₂ -y₁ x₂ -x₁
y -3 = x -6
4 -3 1 -6
y -3 = x -6
1 -5
Dikalikan silang, sehingga
-5(y -3) = 1(x -6)
-5y +15 = x -6
-5y = x -6 -15
-5y = x -21
x +5y -21 = 0
Y-Y1 =X-1 = Y-3 X-6
------- ------ ---- = ----- DIKALI SILANG -5(Y-3) + 1( X-6)
Y2-Y1 X2-X1 4-3 -5 = -5Y-15+1X-6= 5Y-21+1X