I am not sure exactly what you are trying to visualize. Maybe this?
RegionPlot3D[z >= Sqrt[x^2 + y^2], {x, -5, 5}, {y, -5, 5}, {z, 0, 5}, PlotPoints -> 50, ColorFunction -> Hue]
Thank you so so so so much! I think that's it! I am very new to Mathematica and all your help was truly gold! Thank you!!
Hi Matilda,
Is this what you are looking for?
z[x_, y_] := Sqrt[x^2 + y^2]; ContourPlot[z[x, y], {x, -5, 5}, {y, -5, 5}]
Wow thank you so much!!!
Do you think I should use ContourPlot3D instead since it's in range R3? Also, how would I make it ">=" instead of "="? It doesn't seem to work when I replace it just like that.
