Answer:
Input is 5
Output is -18
Explanation:
In this example i believe the linear function has a pattern.
In the Input it goes 1, 2, 3, and then 4. If we continue this pattern we would then know that n equals 5.
In the Output it goes -10, -12, -14, and then -16. If we continue this pattern we would then know that the empty box equals -18.
I hope this helps have a great day :)