Can someone help me and show me how to do it step by step

Which property is illustrated by the following statement? if hxa rgi, then rgi hxa.

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

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)