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The graph of [tex]f(x)=|x|[/tex] is shifted to the right 3 units and stretched vertically by a factor of 4. Which function describes the graph of the transformed function?

A. [tex]g(x)=4|x-3|[/tex]
B. [tex]g(x)=4|x+3|[/tex]
C. [tex]g(x)=|4x|-3[/tex]
D. [tex]g(x)=|4x|+3[/tex]


Sagot :

To solve this problem, let's break it down step by step:

1. Start with the original function:
The original function given is [tex]\( f(x) = |x| \)[/tex].

2. Horizontal shift to the right:
Shifting a function to the right by 3 units involves replacing [tex]\( x \)[/tex] with [tex]\( (x - 3) \)[/tex]. Thus, the function becomes:
[tex]\[ f(x) = |x - 3| \][/tex]

3. Vertical stretch by a factor of 4:
Vertical stretch by a factor of 4 involves multiplying the entire function by 4. Therefore, the vertically stretched function will be:
[tex]\[ g(x) = 4 \cdot |x - 3| \][/tex]

4. Combine the transformations:
Combining both transformations, the rightward shift and vertical stretch, the final transformed function is:
[tex]\[ g(x) = 4|x - 3| \][/tex]

So, the correct function describing the transformed graph is [tex]\( g(x) = 4|x - 3| \)[/tex].

Thus, the correct answer is:
A. [tex]\( g(x) = 4|x-3| \)[/tex]