Respostas

2013-11-05T11:31:31-02:00
Y = ax+b
ax+b = y
-4x+b = 2
  2x+b = 5 .(2)
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-4x+b = 2
 4x+2b = 10
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3b = 12
b = 12/3
b = 4

2x+b = 5
2x+4 = 5
2x = 5-4
2x = 1
x = 1/2

y = ax+b
y = 1/2a + 4
2 3 2