Math Problem Statement

The graph shows g(x), which is a transformation of f(x) = |x|. Write the function rule for g(x).

Solution

From the graph you provided, we can observe that the function g(x)g(x) is a transformation of the absolute value function f(x)=xf(x) = |x|.

Analysis of the transformation:

  1. Vertical stretch/shrink: The slope of the lines forming the "V" shape in g(x)g(x) is 2, as the graph rises by 2 units for every 1 unit horizontally. This indicates that there is a vertical stretch by a factor of 2. Thus, a=2a = 2.

  2. Horizontal shift: The vertex of the original f(x)=xf(x) = |x| is at the origin (0, 0). However, in g(x)g(x), the vertex has shifted to (2,0)(-2, 0). This indicates a horizontal shift to the left by 2 units. Thus, h=2h = -2.

  3. Vertical shift: The graph does not appear to have shifted vertically, as the vertex remains on the x-axis. Therefore, k=0k = 0.

Conclusion:

The function rule for g(x)g(x) is in the form: g(x)=axh+kg(x) = a |x - h| + k Substituting a=2a = 2, h=2h = -2, and k=0k = 0, we get: g(x)=2x+2g(x) = 2 |x + 2|

This is the function rule for g(x)g(x).

Would you like more details or have any questions?

Here are some related questions to explore:

  1. How do you determine the vertex of an absolute value function from its equation?
  2. What is the significance of the parameter aa in an absolute value transformation?
  3. How does the graph change when the value of hh is positive versus negative?
  4. What happens if the value of kk is non-zero in the absolute value transformation?
  5. How would the graph look if aa were a fraction instead of an integer?

Tip: When analyzing transformations, always start by identifying the vertex, then check for any stretching, compressions, or shifts.

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Math Problem Analysis

Mathematical Concepts

Absolute Value Functions
Function Transformations
Algebra

Formulas

g(x) = a|x - h| + k

Theorems

Transformation of Functions
Absolute Value Function Properties

Suitable Grade Level

Grades 8-10