User Portlet User Portlet

Discussions
Hello Wolfram Community, I have a function that takes two parameters and is essentially supposed to return one of two things: "line Crossed" or "no line Crossed". However with this current function I am getting Null as my output. Why is this and...
Objective: I am trying to make a a graph consisting of two graphs 1) a base surface plot 2) a rectangular region that represents the Quadratic Approximation at a specific point(x0,y0) Here is the Code: Manipulate[ Show[basePlot, ...