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= -2
m2 = -1/-2
= 1/2
persamaan
y - y1= m2 ( x-x1)
y - 3 = 1/2 ( x - 0)
y = 1/2x -0 + 3
y = 1/2x + 3
gradien adalah koefifien dari x dengan catatan koefisien y = 1
y=-2x+7
m1 = -2
⊥ m2 ⇒ m1 . m2 = -1
m2 = 1/2
y-y1=m (x-x1)
y-3= 1/2 (x-0)
2(y-3) = x
2y-6 = x
2y-x-6=0