Topic: Function of y?

How do you graph a function of y, i.e. f(y) = ...... ?

I want to draw a vertical line with an undefined slope not 999999999999999999 or something.

As far as I can see it only has f(x).

Help?

Re: Function of y?

You can use a parametric function for this. If you for example want to plot x=sin(y), you can plot it as the parametric function x(t)=sin(t), y(t)=t.