What kind of transformation converts the graph of f(x)=9(x+6)2+1 into the graph of g(x)=9(x+6)2−8?Choices:(A) translation 9 units right(B) translation 9 units left(C) translation 9 units down(D) translation 9 units up
Q. What kind of transformation converts the graph of f(x)=9(x+6)2+1 into the graph of g(x)=9(x+6)2−8?Choices:(A) translation 9 units right(B) translation 9 units left(C) translation 9 units down(D) translation 9 units up
Identify Vertex f(x): Identify the vertex of the function f(x). The function f(x)=9(x+6)2+1 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 at (−6,1).
Identify Vertex g(x): Identify the vertex of the function g(x). The function g(x)=9(x+6)2−8 is also in vertex form, and since the (x+6)2 part is the same as in f(x), the x-coordinate of the vertex will be the same. For g(x), the vertex is at (−6,−8).
Type of Transformation: Determine the type of transformation.Since the x-coordinates of the vertices of f(x) and g(x) are the same, there is no horizontal shift. The y-coordinate of the vertex of g(x) is 9 units lower than the y-coordinate of the vertex of f(x) (1−(−8)=9). This indicates a vertical shift.
Direction of Shift: Determine the direction of the vertical shift.The y-coordinate of the vertex of g(x) is −8, which is less than the y-coordinate of the vertex of f(x), which is 1. This means the graph has moved downwards.
Magnitude of Shift: Calculate the magnitude of the vertical shift.The difference in the y-coordinates of the vertices is 1−(−8)=9. This means the graph of f(x) has been shifted 9 units down to get the graph of g(x).
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