An engineer is making adjustments on a satellite, because he finds it is not focusing the incoming radio waves perfectly. The shape of his satellite can be modeled by the equation (y − 3)2 = 2(x − 2), where x and y are measured in inches. He realizes the static is a result of the feed antenna shifting lightly off the focus point. How many inches in front of the vertex should the feed antenna be?

What is the value of p?
A. -2
B. 2
C. 1/2
D. -1/2