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m=-3/5
y-y1=m(x-x1)
y+4=-3/5(x-2)
( y=-3/5x+6/5-20/5)5
5y=-3x-14
5y=3x+14 (B.)
22. C. karna gradiennya 1/7
23. vtitik (4,0) (0,2)
m=-1/2
jawabannya A. karna gradiennya -1/2... cek aja