I'm willing to bet my week's allowance that the word "Which..." means "Here are
some pictures of graphs. Choose your answer from these pictures.", and that you
decided for some reason not to share the pictures.
That decision saddens me, because without seeing the pictures, there's no way
I can help you identify the correct one.
All I can tell you is: The graph of a quadratic function with a negative discriminant
is a parabola that doesn't cross the x-axis.
Now go forth, and find the correct picture. I offer my best wishes for calm seas
and a prosperous voyage.
