使用等式和/或向量在3d空间中绘制2d平面

I'm trying to make a linear regression plane visualization tool for a math project. Currently I have the math parts completed, but I am not sure how to graph the plane. I have a equation in the form of z=C+xD+yE, where C, D, and E are known constants. How do I graph the plane using these information? Thanks.I'm trying to make a linear regression plane vi