Resposta:
A) X Y
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| 1 | 3.1-1= 2 1 2
| 2 | 3.2-1= 5 2 5
| 3 | 3.3-1= 8 3 8
| 4 | 3.4-1= 11 4 11
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B) X Y
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|-1 | 2.-1+8 = 6 -1 6
| 0| 2.0+8 = 8 0 8
| 1 | 2.1+8 = 10 1 10
| 2| 2.2+8 = 12 2 12
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