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 parabola extends indefinitely to the left and right, so its domain is all real numbers. The x-intercepts at −6 and 2 are below the vertex’s y-coordinate of 4, so the parabola opens downward and has a maximum value of 4. Therefore its range is y ≤ 4, matching choice c.

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