Math Problem Statement

Graph the function f(x) = (x + 5)^2 - 4 by starting with the graph of y = x^2 and using transformations (shifting, stretching/compressing, and/or reflecting).

Solution

The given question asks to graph the function f(x)=(x+5)24f(x) = (x + 5)^2 - 4 by using transformations starting from the parent function y=x2y = x^2. Let's walk through the steps of how this transformation works:


Transformations Breakdown:

  1. Start with the parent function:
    y=x2y = x^2.
    This is a standard parabola that opens upwards, with the vertex at (0,0)(0, 0).

  2. Horizontal Shift:
    The function f(x)=(x+5)24f(x) = (x + 5)^2 - 4 has a horizontal shift.

    • x+5x + 5 shifts the graph 5 units to the left (because the shift is opposite to the sign inside the parentheses).
  3. Vertical Shift:
    The term 4-4 moves the graph 4 units down.

    • So, the new vertex will be at (5,4)(-5, -4).
  4. No Reflection or Stretch/Compression:

    • The coefficient inside the squared term is 1, so the shape (width) of the parabola remains the same as the parent function.
    • There is no reflection (as there is no negative sign).

Summary of Transformations:

  • Shift left by 5 units: x+5x + 5.
  • Shift down by 4 units: 4-4.
  • No stretching/compression or reflection.

Thus, the vertex of the transformed parabola will be at (-5, -4), and it will maintain the same "U" shape as the original y=x2y = x^2.


Graphing Instructions:

  1. Plot the vertex at (5,4)(-5, -4).
  2. Since the graph is not stretched or compressed, follow the usual pattern:
    • From the vertex, move 1 unit right/left and 1 unit up to get additional points.
    • Then move 2 units right/left and 4 units up (since 22=42^2 = 4).
  3. Draw a smooth curve passing through these points.

Would you like me to create an image of this graph, or do you need more clarifications?


Related Questions:

  1. What happens if we change (x+5)24(x + 5)^2 - 4 to (x+5)24-(x + 5)^2 - 4?
  2. How do horizontal and vertical shifts affect the domain and range of a function?
  3. What would happen if we introduced a stretching factor, like 2(x+5)242(x + 5)^2 - 4?
  4. How would the graph change if the equation was (x+5)2+4(x + 5)^2 + 4 instead?
  5. What is the algebraic process to find the vertex of any quadratic function in vertex form?

Tip: When dealing with transformations, always check the sign inside the parentheses for horizontal shifts—it behaves opposite to intuition.

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Math Problem Analysis

Mathematical Concepts

Quadratic Functions
Transformations
Shifts

Formulas

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

Theorems

Transformation Theorem for Shifting and Translating Graphs

Suitable Grade Level

Grades 8-10