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M=3
Krn syarat tegak lurus adalah m1 x m2 = -1, maka =
3 x m2 = -1
M2 = -1/3
.
Masukkan rumus y-b = m (x-a)
Titik = (1,3)
A=1
B=3
Jadi persamaan garisnya,
Y-3 = -1/3 (x-1)
Y-3=-1/3x + 1/3
Y=-1/3x + 1/3 +3
Y= -1/3x + 1/3 + 9/3
Y= -1/3x + 10/3
Gradient= -x/y = 3/y tegak lurus = -y/3
Y= -1/3 (x-1) + 3
-----------------------×3
3y= -x+1+9
3y+x-10=0