Math Problem Statement

Use the graph of y = f(x) to graph the function g(x) = -f(x) - 1.

Solution

To solve this problem, we are tasked with using the graph of y=f(x)y = f(x) to graph the function g(x)=f(x)1g(x) = -f(x) - 1.

Step-by-Step Explanation:

  1. Understanding the given graph:

    • The graph of y=f(x)y = f(x) is a horizontal line segment from x=3x = -3 to x=3x = 3, lying on the line y=3y = -3.
  2. Transformation for g(x)=f(x)1g(x) = -f(x) - 1:

    • The function g(x)=f(x)1g(x) = -f(x) - 1 is obtained from f(x)f(x) by applying two transformations:
      • Reflection across the x-axis: This changes the sign of f(x)f(x), so the values of yy will become positive where they were negative, and vice versa. For the given graph, since f(x)=3f(x) = -3, f(x)=3-f(x) = 3 for the same xx-values.
      • Vertical translation by -1: After reflecting, we shift the graph down by 1 unit. This changes the value of y=3y = 3 to y=2y = 2 for the entire segment.
  3. Applying the transformation:

    • The original line segment from x=3x = -3 to x=3x = 3, which was at y=3y = -3, will first reflect to y=3y = 3, and then shift down by 1 unit to y=2y = 2.

Matching the correct graph:

  • Looking at the options, the correct graph will have a horizontal line segment from x=3x = -3 to x=3x = 3, positioned at y=2y = 2.

  • Correct answer: Option D is the graph that corresponds to this transformation.

Would you like more details, or have any questions?

Here are 5 related questions:

  1. What other transformations can we apply to f(x)f(x) besides reflection and translation?
  2. How does vertical stretching or shrinking affect the graph of a function?
  3. Can you explain horizontal translations and how they would modify f(x)f(x)?
  4. What happens to the graph if we change the function to g(x)=f(x)+2g(x) = f(x) + 2?
  5. How would the graph look if we applied the transformation g(x)=f(x)+1g(x) = -f(x) + 1?

Tip: When reflecting across the x-axis, just change the sign of all the yy-coordinates without altering the xx-coordinates.

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Math Problem Analysis

Mathematical Concepts

Graph transformations
Function reflection
Vertical translation

Formulas

g(x) = -f(x) - 1

Theorems

Reflection across the x-axis
Vertical translation by constant

Suitable Grade Level

Grades 9-11