Math Problem Statement

f(x) = -1/2 * |x + 3| + 4

Solution

The function shown in the image is:

f(x)=12x+3+4f(x) = -\frac{1}{2} |x + 3| + 4

This represents a transformed absolute value function. Let’s break down the components:

  1. Absolute Value: The term x+3|x + 3| represents an absolute value function with a horizontal shift of 3 units to the left (since it's x+3x + 3).

  2. Vertical Compression & Reflection: The coefficient 12-\frac{1}{2} in front of the absolute value compresses the graph vertically by a factor of 12\frac{1}{2} and reflects it across the x-axis (since the coefficient is negative).

  3. Vertical Shift: The +4 at the end shifts the entire graph upwards by 4 units.

Key Characteristics of the Function:

  • Vertex: The vertex of the function occurs when the expression inside the absolute value equals 0, i.e., when x=3x = -3. At this point, the function value is: f(3)=120+4=4f(-3) = -\frac{1}{2} \cdot 0 + 4 = 4 So, the vertex is at (3,4)(-3, 4).

  • Slope: On the left of x=3x = -3, the slope of the function is 12\frac{1}{2} (positive), and on the right, the slope is 12-\frac{1}{2} (negative). This creates the characteristic "V" shape of absolute value functions, though it is inverted due to the negative sign.

  • Range: Since the function is reflected downwards, the maximum value is at the vertex (4), and the range of the function is (,4](-\infty, 4].

Do you want to explore more details, such as the graph or specific points?

Related Questions:

  1. What is the domain of this absolute value function?
  2. How does the graph change if the coefficient of x+3|x+3| is altered?
  3. How would you describe the symmetry of the function?
  4. What happens if the absolute value term x+3|x+3| is replaced by x3|x-3|?
  5. Can you derive the function's equation from the graph of a basic absolute value function?

Tip:

Absolute value functions are always V-shaped, and any transformations affect the direction, steepness, and position of the "V".

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Math Problem Analysis

Mathematical Concepts

Algebra
Absolute Value Functions
Transformations of Functions

Formulas

f(x) = a * |x - h| + k
Vertex of Absolute Value Function

Theorems

Transformations of Functions

Suitable Grade Level

Grades 9-12