3d rotation with a 2d equation on the y-axis

[autographuser]

I\'ve been looking through the help content and can\'t seem to find how to rotate the equation on the y-axis. I only see the equation rotated on the x-axis.

Is there a way to rotate the equation on the y-axis?
can anyone help?

thanks

[Simon]

Dear autographuser,

To do a volume of revolution about the y-axis:

1. Enter an equation of the form x = f(y) and select "Plot as 2D Equation"

2. Select the line and then the right-click option "Find Area"

3. Select the area and then the right-click option "Find Volume"

Hope this helps,

Simon