Answer
$-1.5$
Work Step by Step
The difference between each pair of consecutive terms is called the common difference.
Common difference $d=5-6.5=3.5-5=2-3.5=-1.5$
Big Ideas Math - Algebra 1, A Common Core Curriculum
by Larson, Ron; Boswell, Laurie
Published by
Big Ideas Learning LLC
ISBN 10:
978-1-60840-838-2
ISBN 13:
978-1-60840-838-2
Chapter 4 - Writing Linear Functions - 4.6 - Arithmetic Sequences - Exercises - Page 214: 9
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