What kind of transformation converts the graph of f(x)=−9(x−8)2+3 into the graph of g(x)=−9(x−8)2−5?Choices:(A) translation 8 units up(B) translation 8 units right(C) translation 8 units left(D) translation 8 units down
Q. What kind of transformation converts the graph of f(x)=−9(x−8)2+3 into the graph of g(x)=−9(x−8)2−5?Choices:(A) translation 8 units up(B) translation 8 units right(C) translation 8 units left(D) translation 8 units down
Identify Vertex: Identify the vertex of the function f(x). The function f(x)=−9(x−8)2+3 is in vertex form, where the vertex is given by (h,k). In this case, the vertex of f(x) is (8,3).
Identify Vertex: Identify the vertex of the function g(x). The function g(x)=−9(x−8)2−5 is also in vertex form, and the vertex is (h,k). Here, the vertex of g(x) is (8,−5).
Compare Vertices: Compare the vertices of f(x) and g(x) to determine the transformation.The vertex of f(x) is (8,3) and the vertex of g(x) is (8,−5). The x-coordinates of the vertices are the same, which means there is no horizontal shift. The y-coordinate of the vertex of g(x) is lower than that of f(x), indicating a vertical shift.
Determine Shift: Determine the direction and magnitude of the vertical shift.To find the vertical shift, we calculate the difference in the y-coordinates of the vertices of f(x) and g(x).The difference is 3−(−5)=3+5=8.Since the y-coordinate of g(x) is lower, the graph has shifted downwards.
Identify Transformation: Identify the correct transformation from the given choices.The graph of f(x) has shifted 8 units down to become the graph of g(x). This corresponds to choice (D) translation 8 units down.
More problems from Describe function transformations