Answer
(E)
Work Step by Step
1. The parabola in this graph opens to the right, thus it has a general equation $4p(x-h)=(y-k)^2$
2. Use the vertex $(1,1)$ on the curve, we have $4p(x-1)=(y-1)^2$
3. Thus the answer is (E) with $p=1$
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