A square garden originally has a side length of feet. The length is increased by 5 feet and the width is increased by 3 feet. The new area of the rectangular garden is given by the function , where is the area in square feet. Which of the following is the best interpretation of in this context?
The original side length of the square garden, in feet
The new length of the rectangular garden, in feet
The increase in width of the garden, in feet
The new area of the garden, in square feet
