Which answer describes the type of sequence? 99, 89.9, 78.8, 68.7,  a)geometric b)arithmetic c)neither arithmetic nor geometric

ANSWER

C)neither arithmetic nor geometric

EXPLANATION

The given sequence is



Let us check to see if there is a constant difference.





The two difference are not the same.

Since there is no constant difference, the sequence is not arithmetic.

Let us check to see if there is a common ratio,





Since the ratio is not the same,the sequence is not geometric too.

The sequence is neither arithmetic nor geometric.

The correct answer is C