I’m brand new to Grasshopper and am trying to create a rule so that the diameter of the circle at the base of the cone has an inverse relationship to the vertex, and the shorter the distance to the vertex, the ‘pitch’ of the cone in decreases.

I have attached an illustration of what i need to accomplish.

I’ve tried using a separate curve, and then using revolution to make the cone/dome/*convex cone* (I dont think thats the correct term), and use a simple quadratic expression: y=mx^2, where m=k/(dist from base midpoint to vertex.