Question

Select ALL of the following that are examples of an arithmetic sequence.
Responses

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

20, 14, 8, 2, −4, −10
20, 14, 8, 2, −4, −10

3, 9, 27, 81, 243
3, 9, 27, 81, 243

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

Answer 1

20, 14, 8, 2, −4, −10
constant difference of -6

1,000 feet per day. (constant difference of -1000)

BY THE WAY 3, 9, 27, 81, 243 is a GEOMETRIC sequence with ratio of 3

Answer 2

4,000 feet
3,000 feet
2,000 feet
1,000 feet
0 feet
-1,000 feet

Answer 3

Apologies for the mistake. You are correct. The sequence 3, 9, 27, 81, 243 is a geometric sequence, not an arithmetic sequence. Thank you for pointing that out.