Creating a standard cone is simple enough to do. However, the radius increases linearly along its axis. Is there a way to create one with an exponentially larger radius? For instance, suppose the radius y along the axis x is y=0.3x^2, where x>0 and <8. Can I somehow input a quadratic formula and limits somewhere to achieve this result? Or is there another alternative?
EDIT: In case it helps, I tried to subdivide the cone and change the smoothness. However, it creates the opposite effect. The higher the smoothness, the more convex it becomes. I'm trying to make it concave, but the smoothness value can't go negative.