Hmm. Try counting the side of the shape and add the sides. Using the sides as numbers you may be able to solve the problem.
ANSWER
The correct choice is C.
EXPLANATION
The perimeter of a rectangle is given by;
P=2(w+l)
For the first rectangle, the perimeter is;
P=2(8+4)=24
For the second rectangle, the perimeter is
P=2(8+8)=32
For the third rectangle, the perimeter is
P=2(8+12)=40
The correct choice is C
The graph has to be a straight line that pass through the origin (0,0)
It would cost $35 because 10.50 divided by 3 = 3.5x10=35
