Cherie measures and records the lengths and sizes of the same style of a sandal found at a shoe store.
which equation can be used to determine the approximate shoe size, s, for a foot length of x inches?

I found the missing data: 
table:
foot length (in)    Shoe size(S)
8                                   6
8.5                                7
9                                   8
9.5                               9 
10                               10

Choices:
S = x – 2
S = 2x – 10
S = x + 6
S = 2x + 4

Among the choices, the correct equation is S = 2x - 10

S = 2(8) - 10 = 16 - 10 = 6
S = 2(8.5) - 10 = 17 - 10 = 7
S = 2(9) - 10 = 18 - 10 = 8
S = 2(9.5) - 10 = 19 - 10 = 9
S = 2(10) - 10 = 20 - 10 = 10