How long does it take for a new train to appear at the subway during rush hour. If you referring to "arithmetic progression", it's a sequence of any numbers differing from each other by the same, constant number.

QUESTION

If the last two terms of their sequence were to continue in an arithmetic sequence (increasing or decreasing by a constant difference), what would you predict the next three terms of the sequence to be?

If the last two terms of their sequence were to continue in a geometric sequence (increasing or decreasing by a constant ratio), what would you predict the next three terms of the sequence to be?

Which prediction (arithmetic or geometric) seems more realistic to you, and why?