"The Complete Idiot's Guide to Calculus" - An error?

Hey guys, I'm reading __The Complete Idiot's Guide to Calculus__ and I think the book made a mistake.

Here is a picture of a graph that the author claims to have "origin-symmetry":

http://img213.imageshack.us/img213/4627/origin.jpg

And here is his description of this graph. When the author mentions Figure 3.4, he is mentioning the graph he claims to have "origin-symmetry".

Quote:

Origin-symmetry is achieved when the graph does exactly the opposite thing on either

side of the origin. In Figure 3.4, notice that the origin-symmetric curve snakes down and

to the right as x gets more positive, and up and to the left as x gets more negative. In fact,

every turn in the second quadrant is matched and inverted in the fourth quadrant.

To me, it looks like it actually has y-symmetry!

If it had origin-symmetry, the graph to the right of the origin should be in quadrant 4, not quadrant 1! Because when x>0, y must be **negative**. And when x<0, y must be **positive**.

And when the author says "the origin-symmetric curve snakes **down and to the right** as x gets more positive", you can plainly see that the curve actually snakes **up and to the right** when x gets more positive

Is this book actually wrong on this subject?

Thanks for your time!