What is the common difference in the following arithmetic sequence? 2 point 8 comma 4 point 4 comma 6 comma 7 point 6 comma dot dot dot
Answer
A
1 point 6
B
4 point 8
C
negative 1 point 6
D
negative 4 point 8
Explanation
Subtract consecutive terms to find the common difference: 4.4 − 2.8 = 1.6. Checking the next pair gives 6 − 4.4 = 1.6, so the common difference is 1.6, choice A.
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