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y - 6 = 4[x - (-2)]
y - 6 = 4x + 8
y = 4x + 8 + 6
y = 4x + 14
2. rumus : y- y1 (per) y2 - y1 = x - x1 (per) x2 - x1
y- 5 (per) 1 - 5 = x - 4 (per) -4 - 4
y - 5 (per) -4 = x- 4 (per) -8
-8(y -5) = -4 (x - 4)
-8y + 40 = -4x + 16
-8y = -4x +16 -40 = -24
y = -4x -24 (per) -8
y = 1(per)2 x + 3