Math Problem Statement

The graph of f is given. Use it to graph the following functions: (a) y = f(2x), (b) y = f(1/2x), (c) y = f(-x), (d) y = -f(-x).

Solution

The problem asks to graph four transformations of the given function f(x)f(x) based on the graph provided. The transformations are as follows:

  1. y=f(2x)y = f(2x)
  2. y=f(12x)y = f\left(\frac{1}{2}x\right)
  3. y=f(x)y = f(-x)
  4. y=f(x)y = -f(-x)

Let’s briefly break down how each transformation affects the graph:

(a) y=f(2x)y = f(2x)

  • This is a horizontal compression by a factor of 2.
  • For every xx-coordinate on the original graph, the corresponding point will now occur at x2\frac{x}{2}, making the graph "squished" horizontally by half.

(b) y=f(12x)y = f\left(\frac{1}{2}x\right)

  • This is a horizontal stretch by a factor of 2.
  • Every xx-coordinate on the original graph will be doubled, spreading the graph out horizontally.

(c) y=f(x)y = f(-x)

  • This represents a reflection over the y-axis.
  • Every point (x,y)(x, y) on the original graph will be reflected to (x,y)(-x, y).

(d) y=f(x)y = -f(-x)

  • This combines a reflection over the y-axis and a reflection over the x-axis, which results in a reflection through the origin.
  • The transformation will flip the graph both horizontally and vertically.

Would you like a detailed description of the points on each graph or further explanations for any of these transformations? Let me know if you'd like to see a sketch or have questions about the transformations.

Here are some related questions for further practice:

  1. What effect does y=f(3x)y = f(3x) have on the graph?
  2. How would the graph change if the transformation was y=f(x)y = -f(x)?
  3. What does the transformation y=f(x+2)y = f(x + 2) do to the graph?
  4. How do vertical and horizontal transformations differ?
  5. What is the graphical interpretation of y=f(13x)y = f\left(\frac{1}{3}x\right)?

Tip: Remember, multiplying inside the function affects the graph horizontally, while multiplying outside the function affects it vertically!

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Math Problem Analysis

Mathematical Concepts

Function Transformations
Graphing
Reflection
Horizontal Stretch/Compression

Formulas

y = f(2x) (Horizontal Compression by 2)
y = f(1/2x) (Horizontal Stretch by 2)
y = f(-x) (Reflection over y-axis)
y = -f(-x) (Reflection over both axes)

Theorems

Transformation of functions
Reflection and Scaling

Suitable Grade Level

Grades 9-12