Answer
The graph labeled as b matches the sequence.
Work Step by Step
$a_n=\frac{8n}{n+1}$
$a_1=\frac{8(1)}{1+1}=\frac{8}{2}=4$
$a_2=\frac{8(2)}{1+2}=\frac{16}{3}$
$a_2=\frac{8(3)}{1+3}=\frac{24}{4}=6$
...
$a_7=\frac{8(7)}{1+7}=\frac{56}{8}=7$
...
$a_{10}=\frac{8(10)}{10+1}=\frac{80}{11}$
As $n$ grows, the sequence approaches 8.
The graph labeled as b matches the sequence.