Math Problem Statement

Determine whether the graph on the right is that of a function by using the vertical-line test. If it is, use the graph to find the following: (a) the domain and range, (b) the intercepts, if any, (c) any symmetry with respect to the x-axis, y-axis, or the origin. Does the graph represent a function? Choose the correct answer below.

Solution

Let's analyze the problem step by step.

Step 1: Determine if the graph represents a function

The vertical line test states that a graph represents a function if and only if every vertical line intersects the graph at most once. From the image:

  • The graph appears to be a curved arc.
  • Any vertical line drawn on this graph will intersect it at most one point.

Thus, the graph does represent a function. The correct answer is B: Yes, because every vertical line can intersect the graph in at most one point.


Step 2: Analyze the graph

(a) Domain and Range:

  • Domain: The horizontal extent of the graph. From the graph, the x-values range from 4-4 to 44, inclusive.
    • Domain: [4,4][-4, 4]
  • Range: The vertical extent of the graph. From the graph, the y-values range from 00 to 44, inclusive.
    • Range: [0,4][0, 4]

(b) Intercepts:

  • x-intercept: The graph crosses the x-axis at (0,0)(0, 0).
  • y-intercept: The graph also crosses the y-axis at (0,0)(0, 0).

Thus, the intercepts are (0,0)(0, 0).

(c) Symmetry:

  • The graph is symmetric about the y-axis, as the left and right halves are mirror images.

Final Answer:

  1. The graph represents a function.
  2. Domain: [4,4][-4, 4]
  3. Range: [0,4][0, 4]
  4. Intercepts: (0,0)(0, 0)
  5. Symmetry: Symmetric with respect to the y-axis.

Do you have any questions or need further clarification?


Here are five related questions for practice:

  1. What is the domain of a function if its graph spans all x-values except x=2x = 2?
  2. How do you determine symmetry with respect to the origin?
  3. If a graph fails the vertical line test, what does it represent?
  4. Can a function have more than one y-intercept? Why or why not?
  5. How would the range change if the graph extended upward to y=6y = 6?

Tip: Always verify a graph’s symmetry by substituting x-x or y-y into the function’s equation (if available).

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Math Problem Analysis

Mathematical Concepts

Functions
Vertical Line Test
Graph Analysis

Formulas

Vertical Line Test

Theorems

Function Definition

Suitable Grade Level

Grades 8-10