Answer:
A (first option from the left)
Explanation:
The y values of a linear function should increase/decrease by a direct amount that DOESN'T change.
Let's evaluate each answer choice to show you what I'm describing:
Answer Choice A:
As x increases by 1, the y value increases by a direct amount of 1/2. This is why this answer is correct.
Answer Choice B:
As x increases by 1, x first decreases by 1/2, then 1/6, then 1/12. See how the amount being decreased changes? This answer is wrong.
Answer Choice C:
As x increases by 1, x first increases by 2, then 4, then 8. The amount being increased continues to change, so this answer is wrong.
Answer Choice D:
As x increases by 1, x first increases by 6, then 10, then 14. The amount being increased keeps changing, so this answer is wrong.
Hope it helps (●'◡'●)