Question

The sequence is arithmetic or geometric and the common difference or ratio is 5.

Answer 1

1. Arithmetic

2. common difference

1) Examining that sequence we can see that:

$\begin{gathered} -6,-1,4,9 \\ -6+5=-1 \\ -1+5=4 \\ 4+5=9 \end{gathered}$

So as we can see this sequence is an Arithmetic one, whose common difference is 5

2) That is the answer.