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y-y1 = m (x - x1)
y - (-3) = 1/2 (x-4)
y+3 = 1/2 (x-4) 2x
2y+6 = 1 (x-4)
2y+6 = x - 4
-x + 2y + 6 + 4 = 0
-x + 2y + 10 = 0
y- (-3) = 1/2 . ( x - 4 )
y + 3 = 1/2x - 2
y = 1/2x - 2 - 3
y = 1/2x - 5
Jadi, persamaan garis yg dimaksud adlh y = 1/2x - 5