Baby  y    x
1   7.5   7
2   7.9   12
3   8.4   18
4   10.1  45
5   11.5  67
6   12.8  88
7   13.4  92
8   13.9  99
9   13.5  105
10  14.5  108
11  14.7  120
12  15.8  147
13  16.1  156
14  16.5  159
15  16.9  167
16  17.3  183
17  17.6  195