A picture hanging in an art gallery has a frame 15 inches high and the bottom of the frame is 6 feet above the floor. A person whose eye is 6 ft above the floor stands x feet from the wall. Let A be the angle formed by the ray from the person's eye to the bottom of the frame and the ray from the person's eye to the top of the frame. Write A as a function of x and graph y = A(x) .
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