Using the graph of the function [tex]g(x) = \log_5(x - 3)[/tex], what are the x-intercept and asymptote of [tex]g(x)[/tex]?

A. The x-intercept is 4, and the asymptote is located at [tex]x = 3[/tex].
B. The x-intercept is 3, and the asymptote is located at [tex]x = 4[/tex].
C. The x-intercept is 4, and the asymptote is located at [tex]y = 3[/tex].
D. The x-intercept is 3, and the asymptote is located at [tex]y = 4[/tex].



Answer :

Let's analyze the function [tex]\( g(x) = \log_5(x - 3) \)[/tex] to determine the x-intercept and the asymptote.

### Step-by-Step Solution:

1. Understanding the Function:

The given function is [tex]\( g(x) = \log_5(x - 3) \)[/tex]. This is a logarithmic function with the base 5 and the argument [tex]\(x - 3\)[/tex].

2. Finding the Vertical Asymptote:

For a logarithmic function of the form [tex]\( g(x) = \log_b(x - h) \)[/tex], the vertical asymptote occurs where the argument of the logarithm is 0 because the logarithm of 0 is undefined.

Set the argument equal to 0:
[tex]\[ x - 3 = 0 \implies x = 3 \][/tex]
Hence, the vertical asymptote is at [tex]\( x = 3 \)[/tex].

3. Finding the x-intercept:

The x-intercept of a function is the value of [tex]\( x \)[/tex] where [tex]\( g(x) = 0 \)[/tex].

Set the function equal to 0 and solve for [tex]\( x \)[/tex]:
[tex]\[ \log_5(x - 3) = 0 \][/tex]
Recall that [tex]\( \log_b(1) = 0 \)[/tex] for any base [tex]\( b \)[/tex]. Thus:
[tex]\[ x - 3 = 1 \implies x = 4 \][/tex]
Hence, the x-intercept is at [tex]\( x = 4 \)[/tex].

4. Conclusion:

Based on our analysis, the x-intercept of the function [tex]\( g(x) = \log_5(x - 3) \)[/tex] is 4, and the asymptote is located at [tex]\( x = 3 \)[/tex].

### Choice Identification:

Given the choices, the correct statement is:
- The [tex]\(x\)[/tex]-intercept is 4, and the asymptote is located at [tex]\(x = 3\)[/tex].