Answer:
It would be B. 5-3x
Step-by-step explanation:
This function had a constant rate of change and has a y int
The only formula that can be used to describe the sequence is definitely the third one

. So count like that

and so on. You can check others by yourself to check if I'm right or not.
It would be .345% because to change it to a percent all you have to do is move the decimal point two places to the right.
Does the person have to be expert? Because I can help?