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m₂ = -1/3
y = -1/3x - ( -2 + 1 )
y = -1/3x + 1
3y = -x + 3
x + 3y - 3 = 0
= 3
m2 = -1/3
= -1/3
y -y1 = m2 (x-x1)
y - (-1) = -1/3 (x-6)
y + 1 = -1/3x + 2
y = -1/3x +2 -1
y = -1/3x + 1
3y = - x + 3
atau
x + 3y = 3