Given the two functions, which statement is true?
(function is in picture)

A) g(x) is stretched vertically by a factor of 2 and shifted to the right 4 units compared to f(x).

B) g(x) is shrunk vertically by a factor of ½ and shifted to the right 4 units compared to f(x).

C) g(x) is stretched vertically by a factor of 2 and shifted to the left 4 units compared to f(x).

D) g(x) is shrunk vertically by a factor of ½ and shifted to the left 4 units compared to f(x).

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eudora eudora · Answer 1 · 2021-03-28T13:51:23+02:00

Answer:

Option D

Step-by-step explanation:

f(x) = [tex]\text{log}_{15}x[/tex]

Transformed form of the function 'f' is 'g'.

g(x) = [tex]\frac{1}{2}\text{log}_{15}(x+4)[/tex]

Property of vertical stretch or compression of a function,

k(x) = x

Transformed function → m(x) = kx

Here, k = scale factor

1). If k > 1, function is vertically stretched.

2). If 0 < k < 1, function is vertically compressed.

From the given functions, k = [tex]\frac{1}{2}[/tex]

Since, k is between 0 and [tex]\frac{1}{2}[/tex], function f(x) is vertically compressed by a scale factor [tex]\frac{1}{2}[/tex].

g(x) = f(x + 4) represents a shift of function 'f' by 4 units left.

g(x) = f(x - 4) represents a shift of function 'f' by 4 units right.

g(x) = [tex]\frac{1}{2}\text{log}_{15}(x+4)[/tex]

Therefore, function f(x) has been shifted by 4 units left to form image function g(x).

Option D is the answer.