Which table of values represents a linear function?

A
xx yy
33 99
55 00
66 minus, 3−3
77 minus, 6−6
B
xx yy
00 99
44 66
66 44
88 22
C
xx yy
minus, 1−1 44
11 00
22 minus, 2−2
33 minus, 4−4
D
xx yy
minus, 4−4 66
minus, 2−2 55
11 44
33 33

A table of values that represents a linear function is table D.

In this table, as the x-values increase by 1, the y-values increase or decrease by a constant rate. This indicates that the function is linear.