Question

Which of the following sequences represents an arithmetic sequence with a common difference d = −5?

a
4, −20, 100, −500, 2,500

b
1,250, 250, 50, 10, 2

c
30, 25, 20, 15, 3

d
47, 42, 37, 32, 27

Answer 1

D. 47, 42, 37, 32, 27

Explanation:

common difference between every two consecutive terms is -5:

42 - 47 = -5

37 - 42 = -5

32 - 37 = -5

27 - 32 = -5

therefore sequence D represents an arithmetic sequence with a common difference of −5.

hope that helps...