Math Problem Statement

The graph of y = |x| is the solid black graph below. Which function represents the dotted graph?

Solution

To determine which function represents the dotted graph, let's analyze the transformation applied to the solid graph of y=xy = |x|, which is the absolute value function.

Analysis:

  1. The solid black graph is the standard absolute value function y=xy = |x|.
  2. The dotted graph appears to be:
    • Reflected across the x-axis.
    • Shifted downward by 4 units.

These observations suggest the transformation follows: y=x4y = -|x| - 4

Correct Answer:

The function representing the dotted graph is y=x4y = -|x| - 4.


Do you want a step-by-step explanation or any further clarification? Here are some related questions you might want to explore:

  1. What are transformations of the absolute value function?
  2. How does reflection across the x-axis affect a graph?
  3. What happens when a graph is shifted vertically?
  4. Can you explain how y=x+4y = -|x| + 4 would look compared to y=xy = |x|?
  5. How do you determine shifts in absolute value functions from their equations?

Tip: Reflections and vertical shifts are common in graph transformations—practice recognizing them visually!

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Math Problem Analysis

Mathematical Concepts

Absolute Value Functions
Graph Transformations
Reflections
Vertical Shifts

Formulas

y = |x|
y = -|x| - k

Theorems

Transformation rules for absolute value graphs

Suitable Grade Level

Grades 8-10