Each box contains 6 pens as shown in the table.
# of
Boxes
# of
Pens
1
6
2
12
3
18
4
24
Which list includes only independent quantities?
O 1, 2, 3, 4
0 2.4, 6, 8
O 1.2, 6, 12
06.12, 18, 24
