+ = - = - = + =
1- = -0.18= -2= 4.25+ =
① - +
② + -
③ -( + )
④ -( - )
⑤ + -
⑥ +( + + )
年龄
0
1
2
3
4
5
6
7
8
9
10
身高/cm
50
74
85
93
101
108
115
120
130
135
141