Use the image to answer the question.

One solid and one dotted curve are drawn in a coordinate plane. The axes range from negative 2 to 2, both by 1-unit increments.

Compare the graphs of f(x)=−x−−√
and g(x)=−x−−√3
. Which of the following features about the graphs is true?

(1 point)
Responses

The graphs are both increasing.
The graphs are both increasing.

The graphs have the same domains.
The graphs have the same domains.

The graphs are both decreasing.
The graphs are both decreasing.

The graphs have the same ranges.

1 answer

To compare the graphs of the functions \( f(x) = -\sqrt{x} \) and \( g(x) = -\sqrt{3} \), let's analyze their features.

  1. Domains:

    • The function \( f(x) = -\sqrt{x} \) is defined for \( x \geq 0 \) because you cannot take the square root of a negative number. Thus, its domain is \( [0, \infty) \).
    • The function \( g(x) = -\sqrt{3} \) is a constant function, which is defined for all \( x \). Hence, its domain is \( (-\infty, \infty) \).
    • Therefore, the graphs do not have the same domains.
  2. Ranges:

    • The function \( f(x) = -\sqrt{x} \) outputs values that range from \( 0 \) (when \( x=0 \)) down to \( -\infty \) as \( x \) increases. Thus, its range is \( (-\infty, 0] \).
    • The function \( g(x) = -\sqrt{3} \) is constant and its range is simply \( {-\sqrt{3}} \).
    • Thus, the graphs do not have the same ranges.
  3. Increasing/Decreasing Behavior:

    • The function \( f(x) = -\sqrt{x} \) is decreasing on its domain \( [0, \infty) \) because as \( x \) increases, \( -\sqrt{x} \) decreases.
    • The function \( g(x) = -\sqrt{3} \) is a constant function, which means it neither increases nor decreases.
    • Therefore, neither graph is both increasing.

Given this analysis, the correct statement comparing the two graphs is:

The graphs are both decreasing. (The accurate option would actually denote that \( f(x) \) is decreasing and \( g(x) \) is constant, but neither is completely correct as a set.)

Therefore, none of the options provided in the question are true based on the accurate description of the features of the graphs.

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