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m = -a/b
= -2/-5
= 2/5
Melalui garis (-4,5)
y - 5 = 2/5 (x + 4) --> kali 5
5y - 25 = 2x + 8
-2x + 5y = 33
2x - 5y = -33 (D)
y-5 = 2/5 ( x+4 )
y-5 = 2/5x + 8/5
y = 2/5x + 33/5
5y = 2x + 33
5y-2x = 33