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m(CD) = y2-y1/x2-x1 = 8-(-2)/5-3 = 10/2 = 5
(-6,0) dan (0,3)
3x-6y = -18
m1 = 1/2
(2,0),(0,4)
4x+2y = 8
2x+y = 4
m2 = -2
Lihat kedudukan,
m1 x m2 = 1/2 x -2 = -1 (Tegak lurus)
Gambar ada di link:
http://www.wolframalpha.com/input/?i=plot+y+%3D+1%2F2+x+%2B+3%2C+y%3D4-2x%2C+x+from+-2+to+4%2C+y+from+0+to+6