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= (y2-y1)/(x2-x1)
=(-4-2)/(6-1)=-6/5
persamaan grs melalui titik P sejajar dgn grs KL :
y-y1=m (x-x1)
y- 1= -6/5 ( x- (-1))
y = -6/5x - 6/5 + 1
y = -6/5x -1/5 --> dikali 5
5y= -6x -1
6x+5y + 1 = 0 ( D)