The first four sequences are shown below 9,5,1,-3 which of the following functions best defines this sequence

Arithmetic sequence.

Step-by-step explanation:

We have been given 9,5,1 and -3

We need to check what kind of sequence is this.

d is common difference we will check difference of consecutive terms.

We can see the difference between all the terms are same that is -4

So, this is an arithmetic sequence.

Arithmetic sequence is the sequence in which the difference between consecutive terms are same.

because they could drop even lower..