9514 1404 393
 (a)  y = 1/2x + 2
Step-by-step explanation:
The only equation that matches the first table entry is ...
 y = 1/2x +2
 3 = (1/2)(2) +2 . . . . first table entry
what is the question? i am guessing you are looking for the area.
to find an area, you have to do length x width.
in this case, it would be 12 ft x 4 ft = 48 sq. ft