The area of a square (in square feet) depends on the length of its sides (in feet). This is written in function notation as a(s).
What is the best interpretation of a(3) = 9?
A.3 sides of the square have a total length of 9 feet.
B.3 of these squares have a total area of 9 square feet.
C. A square with an area of 3 square feet has side lengths of 9 feet.
D. A square with side lengths of 3 feet has an area of 9 square
feet.