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= 3/4
m2 = - 1 x 3/4
= -3/4
persamaan
y - y1 = m2 ( x - x 1)
y -(-3) = - 3/4 ( x -2)
y + 3 = -3/4x + 3/2
y = -3/4x + 3/2 + 3
y = -3/4x + 9/2