Respostas

2013-11-19T16:23:01-02:00
Y = ax+b

ax+b = y
2a+b = -3 . (-1)
6a+b = 1

-2a -b = 3
6a  +b = 1
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4a = 4
a = 4/4
a = 1

2a+b = -3
2.1+b = -3
2+b = -3
b = -3-2
b = -5

y = ax+b
y = x - 5
1 5 1