### Rectangular Coordinates (3-D Graphing, Wireframe)

Graphs functions of the form f (x,y) using 3-dimensional rectangular coordinates.
How to use   ||   Examples   ||   Other Notes

How to Use
• Enter a function f (x,y) in the text input field marked "f (x,y)=" (Example: f (x,y)=5-x2-y2)
• Click the "Graph" button (this button also refreshes the graph)
• Rotate the graph by clicking and dragging the mouse on the graph.
• To erase the graph and input field, click the "Clear" button
The text input field can accept a wide variety of expressions to represent functions, and the buttons under the graph allow various manipulations of the graph coordinates.
For another way to view surfaces, try the "faceted hidden surface" representation.
Examples
 Plane f (x,y)=x-2y Hemisphere f (x,y)=√(25-x2-y2) Paraboloid f (x,y)=x2+y2-8 Saddle f (x,y)=(x2-y2)/10 Waves f (x,y)=cos(x-y) Ripples f (x,y)=cos(2sqrt(x2+y2))

Other Notes
Surfaces in three dimensions are represented in "wireframe" form. The "faceted hidden surface" representation allows for more than one surface to be drawn.