equation for parabola is y = a(x-h)^2 +k, (h, k) is the vertex of the parabola
plug in vertex (-1, 0) h = -1 and k = 0
y = a ( x - (-1))^2 + 0
y = a (x+1)^2 now plug in the values of x and y to find a.
once you have a, plug it into the equation y = ____(x + 1)^2
i could not follow the values for x and y posted in the problem.