Posted by **Nikki** on Sunday, September 20, 2009 at 7:37pm.

g(x) = abs(f(x))

[abs = absolute value]

How exactly do I explain this transformation? I don't think "y-values turn positive, matching x-values of f" works very well.

An example of another transformation:

g(x) = 3f(x)

~Vertical dilation by a factor of 3.

So how do I describe the absolute value transformation?

thanks!

- math -
**jim**, Sunday, September 20, 2009 at 8:01pm
I'd go for "negative y-values are reflected in the x-axis", but my terminology may be out of date.

- math -
**MathMate**, Sunday, September 20, 2009 at 8:07pm
Try

"reflection about the x-axis ∀ f(x)<0"

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