The table is
\| \
x \ | \
50 | \75 | \100 | \125 | \ \
150 \ | \
| \
y \ | \
8 | \12 | \16 | \20 | \ \
24 \ | \
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.
No.