Answer:
The ratio between the costs is constant.
Step-by-step explanation:
In both questions, we're working with a constant price per square inch regardless of how large the mat is. For this reason, even though the price changes, the ratio between the 1 in^2 and 2 in^2 mats will be constant. Observe:
In the first set of mats,
$4.80/$2.88 = 5/3
$2.40/$1.44 = 5/3
In the second set of mats,
$4.00/$2.40 = 5/3
$7.20/$4.32 = 5/3
