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m1 = 1
Tegak lurus, maka:
m1 . m2 = -1
1 . m2 = -1
m2 = -1
Persamaan garis yang melalui (-2, -3) dan m2 = -1:
y - y1 = m2 . (x - x1)
y - (-3) = (-1). (x - (-2))
y + 3 = -x -2
y = -x - 2 - 3
y = -x - 5
x + y = -5
Jawaban::A
Y = x + 1
Gradien = x/y = 1
Karena tegak lurus jadi...
Syarat tegak lurus
M1 . M2 = -1
1 . M2 = -1
M2 = -1
Persamaan garis melalui titik (-2 , -3)
Y - y1 = m(x - x1)
Y - (-3) = -1(x - (-2))
Y + 3 = -x - 2
X + y + 5 = 0
X + y = -5