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 pointAis 3.1 m above the bottom of the door. The equationy = axcan be used to describe the arch. Find the values of^{2}+ bx + ca, bandc.

(Sorry about the small picture, if it needs to be larger I can re-upload it.)

Thanks in advance.