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Pearson Algebra 1 Common Core, 2011 View details

7. Arithmetic Sequences

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Exercise 19 Page 279

What makes a sequence an arithmetic sequence?

Not an arithmetic sequence.

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When a sequence is arithmetic, the difference between two consecutive terms is constant. By examining our sequence, we can see that this is not the case. -9 +( - 8) ⟶ -17 +( - 9) ⟶ -26 +( - 7) ⟶ -33 ⟶ ... Therefore, the sequence is not arithmetic.