Question

What is the explicit rule for the arithmetic sequence shown in the graph?

Answer 1

a(n) = 9.5 + 2(n - 1)

Explanation:

Observe that each new term is obtained by adding 2 to the previous term. Thus, the common difference is 2 and the first term is 9.5.

Then a(n) = 9.5 + 2(n - 1)