Maple question

[hotcommodity]

I'm having trouble graphing vertical lines using Maple Classic. So far I've defined a function and its derivative, and have graphed both. Next I found where f` is equal to zero and I have two points resulting from that. I have to graph vertical lines at these points. I looked through my book and all over google and I can't find one reference to plotting a vertical line, can anyone help please?...

[Klaynos]

I've never done much plotting in maple, always got it to output numbers and use a better program...

 

But have you tried plotting x=10 or something?

[hotcommodity]

I tried to plot the function along with x=-1, like this: plot([f,x=-1],-10..10); and the function f plots fine but an error appears for x=-1.

 

Edit: I found I can use a line segment instead by plotting 2 points, but thanks for the reply.