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2y = −x+6
y=−½x+3
Berarti m = −½
Krn tegak lurus maka
m₁×m₂=−1
m₁ = −1 ÷ −½
m₁ = 2
y-y₁ = m(x−x₁)
y−2=2(x+3)
y=2x+8
Memotong sb y berarti x=0
y = 8
(0,8)