Math Problem Statement

The graph of y = g(x) is shown. Draw the graph of y = g(2x).

Solution

The problem asks to transform the graph of y=g(x)y = g(x) to y=g(2x)y = g(2x). To do this, you need to understand how the transformation y=g(2x)y = g(2x) affects the graph.

Transformation:

The equation y=g(2x)y = g(2x) represents a horizontal compression by a factor of 2. This means that every x-coordinate of the original graph g(x)g(x) is halved, pulling the graph towards the y-axis.

Steps:

  1. Identify key points: Choose some important points on the original graph, particularly the vertices and intercepts.
  2. Apply the transformation: For each point (x,y)(x, y) on the graph of g(x)g(x), the corresponding point on the graph of g(2x)g(2x) will be (x2,y)\left( \frac{x}{2}, y \right).
  3. Sketch the new graph: Once the points have been transformed, redraw the graph based on these points.

Example with key points:

Suppose the original graph has the following points:

  • (4,0)(-4, 0)
  • (2,4)(-2, -4)
  • (2,4)(2, 4)

After applying the transformation xx2x \to \frac{x}{2}, the new points will be:

  • (2,0)(-2, 0)
  • (1,4)(-1, -4)
  • (1,4)(1, 4)

These points should then be used to plot the graph of y=g(2x)y = g(2x).

Let me know if you would like a more detailed visual sketch or have any questions.

5 related questions:

  1. What happens if we change the function to y=g(x2)y = g( \frac{x}{2} )?
  2. How does the transformation y=g(x)y = g(-x) affect the graph?
  3. What is the impact of applying y=2g(x)y = 2g(x) to the graph?
  4. Can you describe how a vertical shift affects the graph of a function?
  5. How do you recognize symmetry in a graph?

Tip: Always track how the input variable xx is affected by transformations such as stretching, compressing, reflecting, or shifting to correctly redraw graphs.

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Math Problem Analysis

Mathematical Concepts

Function Transformation
Graph Stretching and Compressing
Horizontal Scaling

Formulas

g(2x) represents horizontal compression

Theorems

Transformation theorem for function scaling

Suitable Grade Level

Grades 9-11