The table is
\| \
x \ | \
\
y \ | \
| \
-2 \ | \
\
5 \ | \
| \
0 \ | \
\
8 \ | \
| \
2 \ | \
\
10 \ | \
| \
4 \ | \
\
15 \ | \
From the table x increases by 2, y increases by 3.
\So, this is a linear function.
It represents a linear function.