Show algebraically that the graph of an equation of the form:
Ax2 + Dx + Ey + F = 0, A0
a) Is a parabola if E0.
b) Is a vertical line if E = 0 and D2 - 4AF = 0.
c) Is two vertical lines if E = 0 and D2 - 4AF > 0.
d) Contains no points if E = 0 and D2 - 4AF < 0.