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 "yvalues turn positive, matching xvalues 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I'd go for "negative yvalues are reflected in the xaxis", but my terminology may be out of date.

math  MathMate, Sunday, September 20, 2009 at 8:07pm
Try
"reflection about the xaxis ∀ f(x)<0"
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