Question

How many of these sequences have a common different of -4?

-19, -15, -11, -7, -3, ...

19, 15, 11, 7, 3, ...

3, 7, 11, 15, 19, ...

-3, 7, -11, 15, -19, ...


0


1


2


3

Answer 1

Only the second sequence has a common difference of -4.

1 sequence

_____
Common differences are 4, -4, 4, (no common difference).