If f(x) = x^2 is vertically compressed by a factor of 8 to g(x) what is the equation of g(x)?


A. [tex]g(x) = \frac{1}{8}x^2[/tex]

B. [tex]g(x) = (8x)^2[/tex]

C. [tex]g(x)=(\frac{1}{8}x)^2[/tex]

D. [tex]g(x) = 8x^2[/tex]

Respuesta :

Answer: First option

[tex]g(x) = \frac{1}{8}x^2[/tex]

Step-by-step explanation:

Step-by-step explanation:

If the graph of the function [tex]y=cf(x)[/tex]  represents the transformations made to the graph of [tex]y= f(x)[/tex]  then, by definition:

If  [tex]0 <c <1[/tex] then the graph is compressed vertically by a factor c.

If  [tex]|c| > 1[/tex] then the graph is stretched vertically by a factor c

If [tex]c <0[/tex]  then the graph is reflected on the x axis.

In this problem we have the function [tex]f(x)=x^2[/tex] If this function is vertically compressed by a factor of 8 then  [tex]0 <c <1[/tex]  and [tex]c=\frac{1}{8}[/tex]

Therefore the graph of g(x) is  [tex]g(x)=\frac{1}{8}f(x)[/tex]

[tex]g(x) = \frac{1}{8}x^2[/tex]

The answer is the first option