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17 March, 10:09

The vertex of a parabola is at (-2,4) and the x-intercepts are at - 6 and 2. Determine the domain and range of the function.

a. D: all real numbers

R: all real numbers

b. D: - 6 ≤ x ≤ 2

R: y ≤ 4

c. D: all real numbers

R: y ≤ 4

d. D:x ≤ 4

R: all real numbers

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Answers (1)
  1. 17 March, 10:23
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    The correct answer is c)

    D: all real numbers

    R: y ≤ 4

    Step-by-step explanation:

    We know this because a vertex is either a maximum or a minimum for the y value. Since the x-intercepts would be below the vertex, we know that the vertex must be a maximum.

    Also, all parabolas will have a domain of all real numbers.
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