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