Problem:
Grant and Denise describe the sequence below in different ways.
-4, 3, 10, 17, 24 …
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Grant’s equation |
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Denise’s equation |
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y = 7x – 4 |
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next = now + 7 with the first now being –4 |
Determine that both equations are correct and explain why one student is multiplying by 7 and the other is adding 7.