Volume method, having trouble picturing

[Saladsamurai]

So I know it is the "washer" method...but because the book says it is.

The region enclosed by $$x=y^2$$ and $$x=y+1$$ revolved around the y-axis.

Now I think I see it , but is it a "hollow" washer because my bounds y=-1 and y=2 (where the curves intersect) are not ON the axis, thus my coss sections are not disks...

that is to say "the region between the points of intersection and the y-axis does not get "swept out" during the revolution"...

I know this is tricky without a diagram,
thanks,
Casey

 

[transgalactic]

http://www.math.armstrong.edu/faculty/hollis/calcvideos/

lecture 28
they got a similar example with diagram