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= 3/2
m₂ = -1/ / 3 / 2
= -1 x 2/3
= - 2/3
2y = 3x + 6
y = 3/2 x + 3 -----> m = 3/2
syarat tegak lurus : m x ma = - 1
3/2 x ma = - 1
ma = - 1 x 2/3
ma = - 2/3