#### Article Title

#### Abstract

A method of graphing functions of two variables in spreadsheets is presented. The method uses parallel orthogonal projection. The *xyz* coordinate system is revolvable in two planes so the graph can be viewed from any direction. The graph is constructed as a mesh made over the rectangle [*x*_{min}, *x*_{max}] x [*y*_{min}, *y*_{max}] in the *x* and *y* directions. Graphing discontinuous functions are also shown. The visibility problem, that is, the problem of overlapping, is not solved.

#### Recommended Citation

Benacka, Jan
(2011)
Graphing Functions of Two Variables in Spreadsheets,
*Spreadsheets in Education (eJSiE)*:
Vol. 4:
Iss.
3, Article 3.

Available at:
http://epublications.bond.edu.au/ejsie/vol4/iss3/3

*Application for graphing z = f(x,y) if D(f) = R*

Graph f(x,y) DnotR.xls (2196 kB)

*Application for graphing z = f(x,y) if D(f) <> R*

Graph f(x,y) D=R.xlsm (243 kB)

*Application 1 in MS Excel 2007*

Graph f(x,y) DnotR.xlsm (1552 kB)

*Application 2 in MS Excel 2007*