What kind of transformation converts the graph of f(x)=−5(x+8)2+9 into the graph of g(x)=−5(x+8)2+1?Choices:(A) translation 8 units left(B) translation 8 units up(C) translation 8 units down(D) translation 8 units right
Q. What kind of transformation converts the graph of f(x)=−5(x+8)2+9 into the graph of g(x)=−5(x+8)2+1?Choices:(A) translation 8 units left(B) translation 8 units up(C) translation 8 units down(D) translation 8 units right
Identify vertex function: Identify the vertex of the function f(x). The function f(x)=−5(x+8)2+9 is already in vertex form, which is y=a(x−h)2+k, where (h,k) is the vertex of the parabola. For f(x), the vertex is (−8,9).
Identify vertex function: Identify the vertex of the function g(x). The function g(x)=−5(x+8)2+1 is also in vertex form. For g(x), the vertex is (−8,1).
Determine transformation type: Determine the type of transformation.Comparing the vertices of f(x) and g(x), we see that the x-coordinate has not changed, so there is no horizontal transformation.The y-coordinate has changed from 9 to 1, which indicates a vertical transformation.
Determine direction magnitude: Determine the direction and magnitude of the vertical transformation.The y-coordinate of the vertex of f(x) is 9, and the y-coordinate of the vertex of g(x) is 1.To go from 9 to 1, we subtract 8, which means the graph has moved 8 units down.
Match transformation choices: Match the transformation to the given choices.The graph has moved 8 units down, which corresponds to choice (C) translation 8 units down.
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