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garis k yang melalui titik (0,-4) dan (-3,0)
maka
menurut gambar , garis k tegak lurus dgn garis k2
maka mk2 = - 1/mk
= 3/4
pers garis k2 dgn gradien mk2 = 3/4 melalui (2,2)
y-b = mk2 (x-a)
y - 2 = 3/4 (x-2)
------------------------ x 4
4y - 8 = 3x-6
4y - 3x -8+6 = 0
4y - 3x -2 = 0