Math Problem Statement

Describe the transformations necessary to transform the graph of f(x) = |x| into that of g(x) = -|x| + 2.

Solution

The problem asks to describe the transformations necessary to convert the graph of f(x)=xf(x) = |x| into that of g(x)=x+2g(x) = -|x| + 2.

Step-by-step breakdown:

  1. Reflection: The function f(x)=xf(x) = |x| produces a V-shaped graph that opens upwards. In g(x)=x+2g(x) = -|x| + 2, the negative sign in front of the absolute value reflects the graph across the x-axis. This changes the graph from opening upwards to opening downwards.

  2. Translation: The "+2" outside the absolute value indicates a vertical translation. The entire graph is shifted up by 2 units.

Conclusion:

The transformation involves reflecting the graph across the x-axis and then translating it up 2 units.

Thus, the correct answer is:

  • Reflect across the x-axis, translate up 2 units.

Would you like further explanation or have any questions?


Here are 5 related questions to deepen your understanding:

  1. What kind of transformations affect the shape of a graph but not its position?
  2. How do horizontal translations affect the equation of a graph?
  3. How would the graph of g(x)=x2g(x) = |x| - 2 compare to that of f(x)=xf(x) = |x|?
  4. What would happen if the graph were reflected across the y-axis instead of the x-axis?
  5. How would adding a coefficient in front of xx inside the absolute value (e.g., f(x)=2xf(x) = |2x|) affect the graph?

Tip: Always pay close attention to signs when dealing with reflections.

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Math Problem Analysis

Mathematical Concepts

Algebra
Graph Transformations
Absolute Value Functions

Formulas

f(x) = |x|
g(x) = -|x| + 2

Theorems

Graph Reflection
Vertical Translation

Suitable Grade Level

Grades 9-11