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Describe all of the transformations applied to the parent function f(x) = x² to sketch g(x) = 4(x – 2)² – 1. Be sure to be specific in describing each transformation.

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Answer:

It means the graph of f(x) stretch vertically by factor 4, and translate 2 units right and 1 units down to get the graph of g(x).

Explanation:

The parent function is


f(x)=x^2

The given function is


g(x)=4(x-2)^2-1 .... (1)

The translation is defined as


g(x)=kf(x+a)^2+b .... (2)

Where, k is stretch factor, a is horizontal shift and b is vertical shift.

If 0<k<1, then the graph compressed vertically by factor k and if k>1, then the graph stretch vertically by factor k.

If a>0, then the graph shifts a units left and if a<0, then the graph shifts a units right.

If b>0, then the graph shifts b units up and if b<0, then the graph shifts b units down.

On comparing (1) and (2) we get


k=4,h=-2,k=-1

It means the graph of f(x) stretch vertically by factor 4, and translate 2 units right and 1 units down to get the graph of g(x).

Describe all of the transformations applied to the parent function f(x) = x² to sketch-example-1
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