Respostas

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2013-11-25T12:19:44-02:00
Y = ax + b
5 = 3a + b
-5=-2a+b
------------- Sutraia
5-(-5)=3a-(-2a) + b -b
10 = 5a +0b
a=2
5=3.2 +b
b=-1
y=2x -1

f(1/2)=2.1/2 -1 =0