Problem 180 of 7
Diagnose the indexing error in B_n = 1000 - 50(n - 1) for A loan balance starts at $1000 at month 0 and decreases by $50 each month.
Using a hint is okay. It just tells the trainer to give you a little more review.
Hidden until you reveal it.
distinguish term number from input count or time elapsed.
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Model must contain a real off-by-one or start-index error.
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Your answer is equivalent to the expected form.
Walkthrough
Full solution stays hidden until you ask for it.
1. Substitute the starting index into the proposed model.
2. Compare it to the stated first value.
3. Adjust exponent or linear term to match the indexing convention.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Changing the rate/ratio when the issue is indexing.