Answer:
1, for 2 you get y val. 2 = ( 2, 2)
2, for 4 you get val. 3 = ( 4, 3 )
3, for 7 you get y val. 4.5 = ( 7, 4.5 )
4, for 9 you get y val. 5.5 = ( 9, 5.5 )
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