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August 28, 2014

Homework Help: pre-calculus

Posted by Chris on Sunday, September 20, 2009 at 5:24pm.

I'm trying to describe how the graph is related to the parent function.

The parent function is x^3

and the problem is:

y=-(0.8x)^3

I know its a reflection over the x-axis, but what is the formula for how much it expands or shrinks?

Like on another problem it's

y=|x|

and y= |0.2x|

The answer is that it expands by 5, but I'm not exactly sure how to get it.

Thanks.

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