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= 3/4
m2 = -1 x 3/4
= -3/4
persamaan
y -y1 = m ( x -x1)
y - 2 = -3/4 ( x - (-1))
y - 2 = -3/4x - 3/4 ------> x 4
4y - 8 = -3x - 3
4y = -3x - 3 + 8
4y = -3x + 5