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= (0-3)/(2+4)
= -3/6
= -1/2
pers garis yang melalui (2,0):
y-y1 = m(x-x1)
y = (-1/2)(x-2)
2y = -x+2
x+2y = 2
dy/dx=(3-0)/(-4-2)
= 3/-6
= -1/2
y = y1 + m (x-x1)
y = 3 + (-1/2) ( x-(-4))
y= 3 - 1/2 (x+4)
y = 3 - x/2