1) Find the equation of the quadratic which passes through the points with coordinates: (-2, -1), (1, 2), (3, -16).
2) An arch on the top of a door is parabolic in shape. The point A is 3.1 m above the bottom of the door. The equation y = ax2 + bx + c can be used to describe the arch. Find the values of a, b and c.
(Sorry about the small picture, if it needs to be larger I can re-upload it.)
Thanks in advance.