Math Problem Statement

still wrong was -1/4|x+2|-1

Solution

Thank you for the clarification! Let's analyze the graph more carefully, now knowing the correct transformation is g(x)=14x+21g(x) = -\frac{1}{4}|x + 2| - 1.

Step-by-Step Analysis:

  1. Vertex Location:

    • From the graph, the vertex is at (2,1)(-2, -1). This indicates a horizontal shift 2 units to the left (which is represented by x+2x + 2) and a vertical shift 1 unit down (which is represented by the 1-1 outside the absolute value).
  2. Reflection:

    • The graph opens downwards, so it must be reflected across the x-axis. This is why there's a negative sign in front of the absolute value term.
  3. Vertical Compression:

    • The slope of the "arms" of the V-shape is shallower than the standard f(x)=xf(x) = |x|. Normally, the slope of the absolute value graph is 11, but here the slope is much smaller, indicating a vertical compression. The factor 14\frac{1}{4} tells us that the graph has been vertically compressed by a factor of 4.

Correct Equation:

Now that we have identified all the transformations:

  • Reflection: -
  • Horizontal shift: x+2x + 2 (shift 2 units to the left)
  • Vertical compression: 14\frac{1}{4}
  • Vertical shift: 1-1 (shift 1 unit down)

The correct equation is indeed: g(x)=14x+21g(x) = -\frac{1}{4}|x + 2| - 1

This matches the correct answer you provided.

Summary of Transformations:

  • Reflection: The graph is reflected across the x-axis.
  • Vertical Compression: The graph is compressed by a factor of 14\frac{1}{4}.
  • Horizontal Shift: The graph is shifted 2 units to the left.
  • Vertical Shift: The graph is shifted 1 unit down.

Let me know if you'd like a deeper explanation of any of these transformations, or if you have further questions!

Related Questions:

  1. How would the equation change if the graph were stretched instead of compressed?
  2. What is the effect of changing the coefficient 14\frac{1}{4} to another value?
  3. How do horizontal shifts affect the domain of an absolute value function?
  4. What is the domain and range of g(x)=14x+21g(x) = -\frac{1}{4}|x + 2| - 1?
  5. How can you graph an absolute value function with a different slope and vertex without plotting many points?

Tip:

When analyzing transformations, always break down the effects one by one (reflection, stretch/compression, and shifts) to build the final equation!

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Math Problem Analysis

Mathematical Concepts

Absolute Value Functions
Graph Transformations
Vertical and Horizontal Shifts
Reflection
Compression

Formulas

g(x) = -\frac{1}{4}|x + 2| - 1

Theorems

Transformation of Functions

Suitable Grade Level

Grades 9-11