Someone help me out with this question

Which graph represents the following piecewise defined function?

Which of the following equations is of the parabola whose vertex is at (2, 3), axis of symmetry parallel to the y-axis and p = 4? a.)y-3 = 1/16 (x-2)^2 b.)y+3 = -1/16 (x+2)^2 c.)x-2 = 1/16 (y-3)^2

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?