Partial Derivatives of 2-Variable Functions |
![](images/p1.jpg) |
Graph of a function f(x,y) with a point (a,b) in the plane. |
|
![](images/p2.jpg) |
The intersection (in red) of the graph with the plane y = b. |
|
![](images/p3.jpg) |
The plane and the intersection with the graph removed. |
|
![](images/p4.jpg) |
Graph of the function f(x,b), which is just a different view of the
image above. The slope of the blue line (which is tangent to the graph) is fx(a,b). |
|