Math Problem Statement

A quadratic function y, equals, f, of, xy=f(x) is plotted on a graph and the vertex of the resulting parabola is left parenthesis, 4, comma, minus, 5, right parenthesis(4,−5). What is the vertex of the function defined as g, of, x, equals, f, of, x, plus, 2, plus, 2g(x)=f(x+2)+2?

Solution

To find the vertex of the new function g(x)=f(x+2)+2g(x) = f(x + 2) + 2, let's analyze how this transformation affects the vertex of the original function f(x)f(x).

Step-by-Step Solution

  1. Original Vertex of f(x)f(x):

    • The vertex of f(x)f(x) is at (4,5)(4, -5).
  2. Horizontal Shift due to f(x+2)f(x + 2):

    • Replacing xx with x+2x + 2 in f(x)f(x) shifts the graph horizontally to the left by 2 units.
    • Therefore, the xx-coordinate of the vertex shifts from 44 to 42=24 - 2 = 2.
  3. Vertical Shift due to +2+2:

    • Adding 2 to f(x+2)f(x + 2) results in a vertical shift upward by 2 units.
    • Thus, the yy-coordinate of the vertex shifts from 5-5 to 5+2=3-5 + 2 = -3.
  4. New Vertex of g(x)g(x):

    • After both transformations, the vertex of g(x)g(x) is at (2,3)(2, -3).

Final Answer

The vertex of the function g(x)=f(x+2)+2g(x) = f(x + 2) + 2 is: (2,3)(2, -3)

Would you like further details on transformations or have any questions?


Here are some additional questions related to this problem:

  1. How does changing f(x)f(x) to f(xh)+kf(x - h) + k generally affect the graph of a function?
  2. What happens to the vertex of f(x)f(x) if we change g(x)=f(x+2)3g(x) = f(x + 2) - 3?
  3. How would a reflection over the x-axis affect the vertex of f(x)f(x)?
  4. What impact does multiplying f(x)f(x) by a constant have on the graph’s shape and vertex position?
  5. Can we determine the axis of symmetry for g(x)g(x) based on the vertex?

Tip: Remember, horizontal shifts in functions affect the x-coordinates, while vertical shifts adjust the y-coordinates of important points like the vertex.

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Math Problem Analysis

Mathematical Concepts

Algebra
Quadratic Functions
Function Transformations

Formulas

Vertex form of a quadratic function: y = a(x - h)^2 + k

Theorems

Vertex transformation theorem

Suitable Grade Level

Grades 9-10