Math Problem Statement

The x y-coordinate plane is given. A function enters the window in the second quadrant, goes down and right linearly, passes through the point (−4, 1), sharply changes direction at the point (−3, 0), goes up and right linearly, passes through the point (−2, 1), crosses the y-axis at y = 3, and exits the window in the first quadrant. Identify the parent function and the transformation represented by the graph. Write an equation for the function represented by the graph. Step 1 Note that y is always nonnegative and that the two parts of the graph are linear. Identify the parent function of the given graph. y = $$
Correct: Your answer is correct. webMathematica generated answer key That's right! Step 2 The given graph shows the rigid transformation of the function y = |x|. Identify the transformation represented by the graph. (Select all that apply.) vertical shift of 3 units upward reflection in the x-axis horizontal shift of 3 units to the right vertical stretch horizontal shift of 3 units to the left vertical shift of 3 units downward

Solution

Step 1: Identify the Parent Function

The function described involves both linear and non-negative values of yy, with sharp turns and a V-like shape. Based on this information, the parent function is most likely:

y=xy = |x|

This is because the absolute value function, y=xy = |x|, has a V-shape and is always non-negative, fitting the description of the graph entering the second quadrant, changing direction, and having linear segments on either side of the vertex.

Step 2: Identify the Transformation Represented by the Graph

Now let's identify the transformations based on the description of the graph. Here's a step-by-step breakdown of the changes:

  • Vertical shift of 3 units upward: The graph crosses the yy-axis at y=3y = 3, whereas the parent function y=xy = |x| crosses the yy-axis at y=0y = 0. This indicates a vertical shift of 3 units upward.

  • Reflection in the x-axis: There's no mention of the graph being reflected over the x-axis (it stays above the x-axis), so this does not apply.

  • Horizontal shift of 3 units to the right: The function changes direction at x=3x = -3, which corresponds to a shift of 3 units to the right from the parent function's vertex at x=0x = 0. This suggests a horizontal shift of 3 units to the right.

  • Vertical stretch: There's no indication of a stretching in the vertical direction (the function seems to maintain its "V" shape), so this does not apply.

  • Horizontal shift of 3 units to the left: The vertex of the transformed function appears at x=3x = -3, not at x=0x = 0, indicating a horizontal shift to the left of 3 units (not right, as we first suspected).

  • Vertical shift of 3 units downward: The graph is shifted upward by 3 units, not downward. Therefore, this does not apply.

Summary of Transformations:

  • Vertical shift of 3 units upward
  • Horizontal shift of 3 units to the left

Final Equation

Given the transformations, the equation of the transformed function is:

y=x+3+3y = |x + 3| + 3

This reflects:

  • The horizontal shift of 3 units to the left (hence the +3+3 inside the absolute value),
  • The vertical shift of 3 units upward (the +3+3 outside the absolute value).

Would you like to explore more details about transformations or the graphing process? Here are 5 related questions for further learning:

  1. How does the graph of a function change when a horizontal shift and vertical shift occur together?
  2. What would happen to the graph if the function were reflected over the x-axis?
  3. How do you identify the effects of transformations on other functions like y=x2y = x^2 or y=sin(x)y = \sin(x)?
  4. Can you explain how transformations affect the domain and range of the absolute value function?
  5. How do you graph y=x2+5y = |x - 2| + 5 step by step?

Tip: When dealing with absolute value transformations, always pay attention to the shifts inside and outside the absolute value, as they affect horizontal and vertical positioning, respectively!

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Math Problem Analysis

Mathematical Concepts

Transformations of Functions
Absolute Value Functions
Linear Functions

Formulas

y = |x|

Theorems

Rigid Transformations
Vertical and Horizontal Shifts

Suitable Grade Level

Grades 8-10