Answer:
Third option
Explanation:
In linear functions, if we take two any points (x1, y1) and (x2, y2), the next relationship must be satisfied: (y2- y1)/(x2 - x1) = constant
The third option is:
x | y
17 | 16
18 | 17
19 | 19
20 | 20
Taking the points of the previous table, we get:
(17-16)/(18-17) = 1
(19-17)/(19-18) = 2
(20-19)/(20-19) = 1
which is not constant for all points. Then, the relationship is not linear.