$\"\"$

The table is

\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \
\
x
\ \
y
\
\
2000
\ \
$4000
\
\
2001
\ \
$4300
\
\
2002
\ \
$4600
\
\
2003
\ \
$4500
\
\

Express the relation as ordered pairs. $\"\"$ $\"\"$

The domain of the relation is the set of all first (x-coordinates) coordinates.

The domain of the relation is $\"\"$

The range of the relation is the set of second (y-coordinates) coordinates.

The range of the relation is $\"\"$

$\"\"$

Each element of the domain is paired with exactly one element of the range.

Therefore the relation is a function.

$\"\"$

Yes.