Math Problem Statement
The graph above is a transformation of the function f(x)=|x|
Write an equation for the function graphed above
Solution
The given graph is a transformation of the absolute value function . Let's analyze the graph step by step to find the equation for .
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Reflection: The graph opens downward for , indicating a reflection over the x-axis on the left side of the y-axis. This means the graph for negative values of is multiplied by .
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Slope: For , the graph increases with a slope of 1, which is consistent with the parent function . However, for , the slope of the graph is steeper. It has a slope of , indicating a vertical stretch by a factor of 2 for negative -values.
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Vertex: The vertex of the graph is at . This indicates a downward vertical shift of 1 unit.
Putting it all together:
The graph is a piecewise function with the following transformations:
- For , the function follows the standard absolute value function, but with a downward shift by 1 unit: .
- For , the graph has a vertical stretch by 2, and it is reflected (negative slope) with the same downward shift.
Thus, the equation for is:
\begin{cases} -2x - 1 & \text{for } x < 0 \\ x - 1 & \text{for } x \geq 0 \end{cases}$$ Would you like further explanation on any part of this process? Here are 5 related questions: 1. What transformations affect the shape of an absolute value graph? 2. How do you recognize vertical and horizontal shifts in a graph? 3. What does a vertical stretch mean in terms of transformations? 4. How can you write a piecewise function based on graph analysis? 5. How does reflecting a graph over the x-axis or y-axis affect its equation? **Tip**: Always check for shifts, reflections, and stretches/compressions when identifying transformations of a function graph.Ask a new question for Free
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Math Problem Analysis
Mathematical Concepts
Absolute Value Functions
Graph Transformations
Piecewise Functions
Formulas
f(x) = |x|
Piecewise function definition
Theorems
Reflection over the x-axis
Vertical Stretch/Compression
Suitable Grade Level
Grades 9-12
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