>>16754712
equation of parabola:
(y – k)/(v – k) = ((x – h)/(u – h))^2

If (x, y) = (h, k), then the equation becomes 0 = 0^2.
Thus the parabola passes through the vertex (h, k).

If (x, y) = (u, v), then the equation becomes 1 = 1^2.
Thus the parabola passes through the other point (u, v).