Type the correct answer in each box.
x f(x)
-1 1
2 3
3 6
5 7
7 8

The values in the table define the function
f
⁡
(
x
)
. The value of
f
-
1
⁡
(
3
)
is , and the value of
f
-
1
⁡
(
8
)
is .