Answer
$(y-1)^2=-(x-2)$
Work Step by Step
1. Use the given graph, the parabola opens to the left with vertex $(2,1)$, thus we have $(y-1)^2=-4p(x-2)$
2. Use the point $(1,0)$ on the curve, we have $(0-1)^2=-4p(1-2)$ , thus $p=\frac{1}{4}$
3. The equation is $(y-1)^2=-(x-2)$
