Graph the following function using the techniques of shifting, compressing, stretching, and/or reflecting. Start with the graph of the basic function \( y=x^{2} \) and show all stages. Be sure to identify at least three key points. Find the domain and the range of the function. \( f(x)=2(x+2)^{2}-1 \) Which transformations are needed to graph the function \( f(x)=2(x+2)^{2}-1 \) ? Choose the correct answer below. A. une graph of \( y=x^{2} \) should be horizontally shifted to the left by 2 1 units. The graph of \( y=x^{2} \) should be horizontally shifted to the left by 2 B. units, vertically stretched by a factor of 2 , and shifted vertically down by a factor of 2 , and shifted vertically up by by 1 units. The graph of \( y=x^{2} \) should be horizontally shifted to the right by 2 c. units, vertically compressed by a factor of 2 , and shifted vertically down by 1 units. The graph of \( y=x^{2} \) should be horizontally shifted to the right by 2 D. units, vertically compressed by a factor of 2 , and shifted vertically up by 1 units.
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To graph the function \( f(x) = 2(x + 2)^{2} - 1 \), we start with the basic function \( y = x^{2} \). The first transformation involves a horizontal shift to the left by 2 units due to the \( (x + 2) \) term. Then, we apply a vertical stretch by a factor of 2, making the graph steeper. Finally, we shift the graph down by 1 unit because of the \(-1\). The three key points after these transformations are the vertex at \((-2, -1)\), the point \((-1, 1)\), and the point \((-3, 1)\). The domain of the function is all real numbers, \( \mathbb{R} \), as there are no restrictions on the values \( x \) can take. The range is determined by the vertex being the minimum point here, giving us \([-1, +\infty)\) since this is a parabola opening upwards.