Math Problem Statement

The function f(x) is given by f(x) = |x + 2| - 5. Which of the statements are true? Select TWO correct answers.

Solution

The function given is f(x)=x+25f(x) = |x + 2| - 5, and you are asked to select two correct statements about this function. Let's break down its characteristics:

1. Domain of the Function:

The function f(x)=x+25f(x) = |x + 2| - 5 involves an absolute value, which is defined for all real numbers. Therefore, the domain of the function is all real numbers, or (,)(-\infty, \infty).

2. Range of the Function:

The absolute value expression x+2|x + 2| is always non-negative, so the minimum value it can take is 0 (when x=2x = -2). When x=2x = -2, the value of the function is: f(2)=(2)+25=05=5f(-2) = |(-2) + 2| - 5 = 0 - 5 = -5 Since the absolute value can grow indefinitely as x+2|x + 2| increases, the range of the function is [5,)[-5, \infty).

3. Graph Characteristics:

  • The graph of f(x)=x+25f(x) = |x + 2| - 5 is a V-shaped graph, as it is a transformation of the standard absolute value function.
  • The graph is symmetric about x=2x = -2, because the absolute value function creates symmetry around the point where the expression inside the absolute value is zero.

4. Vertex of the Graph:

The vertex of the graph occurs at x=2x = -2, where the function reaches its minimum value 5-5. Therefore, the graph has a minimum point at (2,5)(-2, -5).

5. Symmetry of the Graph:

As mentioned earlier, the graph is symmetric around the line x=2x = -2.

Summary of Possible Correct Statements:

  • Domain: All real numbers.
  • Range: y5y \geq -5.
  • Graph: Has a minimum at (2,5)(-2, -5) and is symmetric about x=2x = -2.

Would you like more details about any of these points or clarifications? Here are 5 related questions to explore further:

  1. How do transformations affect the graph of an absolute value function?
  2. What are the properties of the absolute value function x|x|?
  3. How can we determine the vertex of an absolute value function?
  4. What is the range of a transformed absolute value function?
  5. How do we algebraically verify the domain of any given function?

Tip: Always look at how shifting the graph of a parent function (like x|x|) affects its domain, range, and symmetry.

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Math Problem Analysis

Mathematical Concepts

Absolute Value Function
Domain and Range of Functions
Graph Transformations

Formulas

f(x) = |x + 2| - 5

Theorems

Properties of Absolute Value Functions

Suitable Grade Level

Grade 11