Answer:
14a. an = 149 -6(n -1)
14b. Evaluate the formula with n=8.
15. (no question content)
Step-by-step explanation:
14. Each week, sales decreases by 6, so the arithmetic sequence for sales has a first term of 149 and common difference of -6. The general formula for the n-th term is ...
an = a1 + d·(n -1) . . . . . . where a1 is the first term, d is the common difference
Putting the numbers for this sequence into the general formula, we get ...
an = 149 -6(n -1)
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To predict the sales for the 8th week, put n=8 into the formula and do the arithmetic.
a8 = 149 -6(8-1) = 107 . . . . predicted sales for week 8
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15. The graph is shown attached. There is no question content.
