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In an arithmetic sequence, the first term, a₁, is equal to 9, and the third term, a3, is equal to 19. Which number represents the common difference of the arithmetic sequence?

In an arithmetic sequence, the first term, a₁, is equal to 9, and the third term, a3, is equal to 19. Which number represents the common difference of the arithmetic sequence?
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In an arithmetic sequence, the first term, a₁, is equal to 9, and the third term, a3, is equal to 19.

Which number represents the common difference of the arithmetic sequence?

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User More Tension
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5 is the common difference

If a1 is 9 and a3 is 19, then a2 is 14. So 5 is the difference between each term.
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User Tyreke
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