Questions: Graph the function.
y=-log3(x-2)+1
Specify the domain, range, intercept(s), and asymptote. (If an answer does not exist, enter DNE.) Domain:
(-2, infty)
(2, infty)
(0, infty)
(-infty, infty)
(-2,4)
Range:
(2, infty)
(-infty, 2)
(0, infty)
(-infty, infty)
(-infty, 3)
x-intercept
(x, y)=()
Transcript text: Graph the function.
\[
y=-\log _{3}(x-2)+1
\]
Specify the domain, range, intercept(s), and asymptote. (If an answer does not exist, enter DNE.) Domain:
$(-2, \infty)$
$(2, \infty)$
$(0, \infty)$
$(-\infty, \infty)$
$(-2,4)$
Range:
$(2, \infty)$
$(-\infty, 2)$
$(0, \infty)$
$(-\infty, \infty)$
$(-\infty, 3)$
$x$-intercept
$(x, y)=($ $\square$
Solution
Solution Steps
Step 1: Find the domain
The argument of the logarithm must be positive, so $x - 2 > 0$, which implies $x > 2$. Thus, the domain is $(2, \infty)$.
Step 2: Find the range
The range of a logarithmic function is all real numbers. Since the given function is a reflection and vertical shift of a logarithmic function, the range remains $(-\infty, \infty)$.
Step 3: Find the x-intercept
The x-intercept occurs when $y = 0$.
So, $0 = -\log_3(x-2) + 1$.
Then, $\log_3(x-2) = 1$.
Rewriting in exponential form gives $x - 2 = 3^1 = 3$.
Therefore, $x = 5$. The x-intercept is $(5, 0)$.