Answer
The points lie on a line.
The graph is shown below.
Work Step by Step
The given arithmetic sequence is
$0,4\frac{1}{2},9,13\frac{1}{2},...$
$0,\frac{9}{2},9,\frac{27}{2},...$
Make a table. Then plot the ordered pairs $(n,a_n)$
The table is shown below.
