Which set of ordered pairs represents y as a function of x?

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?

Select the correct answer from each drop-down menu. the length of a rectangle is 5 inches more than its width. the area of the rectangle is 50 square inches. the quadratic equation that represents this situation is the length of the rectangle is inches.

Which expression gives the exact value of x?