Oliver is doing a study on age and shoe size. he has collected the data shown above.

do the ordered pairs (x, y) he has collected form a function?
a) cannot be determined
b) yes, because for every x there is only one y.
c) yes, because for every y there is only one x.
d) no, because for some x's there are more than one y's.
eliminate
age and shoe size
x (age) y (size)
8 7
9 8
10 9
8 9
14 9
15 11
10 10
33 9
27 9.5
45 10.5