Use the image to answer the question.

A coordinate plane for f of x versus x.

Describe the graph of f(x) by selecting the correct statement.

(1 point)
Responses

The average rate of change is negative on the interval [1,3] and also on the interval [6,7].
The average rate of change is negative on the interval left bracket 1 comma 3 right bracket and also on the interval left bracket 6 comma 7 right bracket .

The average rate of change is negative only on the interval [1,3].
The average rate of change is negative only on the interval left bracket 1 comma 3 right bracket .

The average rate of change is negative on the interval [0,1] and on the interval [3,4].
The average rate of change is negative on the interval left bracket 0 comma 1 right bracket and on the interval left bracket 3 comma 4 right bracket .

The average rate of change is negative only on the interval [6,7].
The average rate of change is negative only on the interval left bracket six comma seven right bracket .
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the points are (-1,0) (1,1) (3.0) (5,2) (6,2) (7,0)

1 answer

To analyze the average rate of change of the function \( f(x) \) based on the given points (-1,0), (1,1), (3,0), (5,2), (6,2), and (7,0), we need to look at the slopes between key intervals.

  1. Interval \([1, 3]\):

    • \( f(1) = 1 \)
    • \( f(3) = 0 \)
    • Average rate of change: \( \frac{f(3) - f(1)}{3 - 1} = \frac{0 - 1}{2} = -\frac{1}{2} \) (negative)
  2. Interval \([6, 7]\):

    • \( f(6) = 2 \)
    • \( f(7) = 0 \)
    • Average rate of change: \( \frac{f(7) - f(6)}{7 - 6} = \frac{0 - 2}{1} = -2 \) (negative)
  3. Interval \([0, 1]\):

    • \( f(0) \) is not given, but it appears to be between \( (-1, 0) \) and \( (1, 1) \), likely \( f(0) = 0 \) (assuming continuity or estimate).
    • Average rate of change: \( \frac{f(1) - f(0)}{1 - 0} = \frac{1 - 0}{1} = 1 \) (not negative)
  4. Interval \([3, 4]\):

    • \( f(3) = 0 \), but \( f(4) \) is not given; assuming it increases or remains at 0, we cannot conclude definitively about negativity.

Thus, if we analyze the intervals more critically:

  • The average rate of change is negative in intervals \([1, 3]\) and \([6, 7]\).

Given this analysis, the response that best describes the graph of \( f(x) \) is:

  • The average rate of change is negative on the interval [1,3] and also on the interval [6,7].
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