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B. f(n) = 8(2)^n-1

Step-by-step explanation:

I used guess and check to answer this.

Check--

First term: 8(2)^1-1 = 8

Second term: 8(2)^2-1 = 16

Third term: 8(2)^3-1 = 32

Fourth term: 8(2)^4-1 = 64

Fifth term: 8(2)^5-1 = 128

YES, LINEAR. CONSTANT OF 5. He sells 5 propane stoves each day for 4 consecutive days.

YES, LINEAR. CONSTANT OF 125. Tim's profit decreases by $125 each day for 5 days. 

NO, NON LINEAR. EXPONENTIAL. Tim's profit doubles each month for 3 consecutive months.

YES, LINEAR. CONSTANT OF 2. Tim sells 2 fewer fishing poles each day for 1 week.