Question

Select ALL of the following that are examples of an arithmetic sequence. (1 point)
Responses

3, 9, 27, 81, 243

3, 9, 27, 81, 243


20, 14, 8, 2, −4, −10

20, 14, 8, 2, −4, −10


You start at an elevation of 12,000 feet and climb down 1,000 feet per day.
You start at an elevation of 12,000 feet and climb down 1,000 feet per day.

1, 11, 21, 25, 31, 38

1, 11, 21, 25, 31, 38


You add $2 to a piggy bank and add triple the money you added the previous day for one month.

Answer 1

The arithmetic sequences are:

- 20, 14, 8, 2, −4, −10 (common difference −6)
- You start at 12,000 ft and climb down 1,000 ft per day (common difference −1,000)

The others are geometric or have nonconstant differences.