will give brainliest to the person with the most detailed answer. That means tell me how you got ur answer. And the person who answers with the most clear explanation as well. Good luck

A linear function simply means it is a straight line on a plane.

The answers are as follows:

1. Not a linear function

2. 2nd sets of points - (0,10)...(4,38)

3. Not a linear funtion

4. 2x+6

5. -9x

6. Not a linear function

7. The 3rd set of points - (-2,-7)...(2,5)

Im sorry for not having an explanation, I wouldn't be able to for each answer in 8 minutes.