This is a reference to an article, on the JKP excel site, on how to type
in the equation and have it plotted

When doing mathematics, wouldn't it be nice if we could type an equation
into a cell in Excel and immediately see the resulting graph?

http://www.jkp-ads.com/Articles/ChartAnEquation00.htm

It takes a small amount of setting up and you will learn loads on the way.

hth RES