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y= -2x +4
karena sejajar m= -2
y-b = m(x-a)+r(√1+m²)
y-1 = -2 (x+3)+ √5 ( √1+-2²)
y-1 = -2x-6+√5√5
y-1=-2x-6+5
y= -2x -6+5 +1
y= -2x
atau
y-1 = -2x -6 -5
y = -2x-10