SOLUTION: The explicit rule for a sequence is f(n)=1.25(n-1)+6.25. What should I do to find the recursive rule?

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Question 1102909: The explicit rule for a sequence is f(n)=1.25(n-1)+6.25.
What should I do to find the recursive rule?
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
The explicit rule is linear.
Hence by the slope formula, f(n) - f(n-1) = 1.25, and therefore, f(n) = f(n-1) + 1.25.