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3) A(2,1) dan B(-6,-2)a)
m = (y2 - y1)/(x2 - x1)
m = (-2 - 1)/(-6 - 2)
m = -3/-8
m = 3/8
Jadi gradien garis l adalah 3/8
b)
garis g sejajar dengan garis l maka :
ml = 3/8
ml = mg = 3/8
Jadi gradien garis g adalah 3/8