persamaan garis melaui titik (2,4) dan (-1,-5) adlah... A. y - 3x + 2 = 0 B. y - 3x - 2 = 0 C. y + 3x + 2 = 0 D. y + 3x - 2 = 0 mohon bantuannya

y-y1 /y2-y1 = x-x1 /x2-x1
y -4/-5-4 = x-2 /-1-2
y -4/ -9 = x-2/ -3
-3(y-4) = -9(x -2)
-3y +12 = -9x +18
9x -3y -6 = 0
3x -y -2 = 0
------------------- × -1
-3x +y + 2 = 0
y - 3x + 2 = 0 (A)

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