Math Problem Statement

Use the graphs of f and h to describe the transformation from the graph of f to the graph of h. Given: f(x) = 1/4x - 2; h(x) = -f(x)

Solution

To analyze the transformation from the function f(x)f(x) to h(x)h(x), let’s first examine both functions:

  1. Given functions:

    • f(x)=14x2f(x) = \frac{1}{4}x - 2
    • h(x)=f(x)h(x) = -f(x)
  2. Step-by-Step Transformation Analysis:

    • Since h(x)=f(x)h(x) = -f(x), we are applying a vertical reflection of f(x)f(x) across the x-axis.
    • To be explicit, substitute f(x)f(x) into h(x)h(x): h(x)=(14x2)=14x+2h(x) = -\left(\frac{1}{4}x - 2\right) = -\frac{1}{4}x + 2
    • Therefore, the function h(x)=14x+2h(x) = -\frac{1}{4}x + 2 represents a reflection of f(x)f(x) across the x-axis.
  3. Summary:

    • The transformation from the graph of f(x)f(x) to h(x)h(x) is a reflection across the x-axis. This changes the slope's sign and reflects any y-intercepts to the opposite side of the x-axis.

Would you like more details on the effects of this reflection or on the characteristics of the graph?


Here are some related questions for further exploration:

  1. What would be the effect if we reflected f(x)f(x) across the y-axis instead of the x-axis?
  2. How would the transformation change if h(x)=f(x)+3h(x) = -f(x) + 3 instead of just h(x)=f(x)h(x) = -f(x)?
  3. Can you describe how the slope and y-intercept change under a vertical reflection?
  4. What would be the impact of adding a constant to f(x)f(x) before reflecting it?
  5. How would we transform f(x)f(x) if we wanted to reflect it across both axes?

Tip: When reflecting a function vertically, only the y-values (outputs) of each point change signs, flipping the graph across the x-axis.

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Math Problem Analysis

Mathematical Concepts

Function Transformation
Reflection
Linear Functions

Formulas

h(x) = -f(x)
f(x) = (1/4)x - 2

Theorems

Reflection across the x-axis

Suitable Grade Level

Grades 9-11