Plz i need help and plz explain

The graph of fx shown below has the same shape as the graph of gx = 3x^2 but is shifted down 2 units

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

Which of these tables represents a non-linear function?