Question

Find the specific formula for the sequence. [−3,1,5,9,13,...]

Answer 1

Hello There!

-3      1      4      9      13.
    +4    +4    +4    +4

As you can see above, to get from one number to the next it is simply adding 4. So the formula is simply just x + 4.

Hope This Helps You!
Good Luck :) 

- Hannah ❤