Math Problem Statement

Is this graph even or odd?

Is this graph even or odd?

Solution

The function given is f(x)=3xf(x) = 3|x|, which represents the absolute value function scaled by 3. Let's analyze whether this function is even or odd.

  1. Even Function Test: A function is even if f(x)=f(x)f(-x) = f(x) for all values of xx.

    • For x=2x = -2, f(2)=32=6f(-2) = 3|{-2}| = 6 and f(2)=32=6f(2) = 3|2| = 6.
    • For x=1x = -1, f(1)=31=3f(-1) = 3|{-1}| = 3 and f(1)=31=3f(1) = 3|1| = 3.
    • For x=0x = 0, f(0)=0f(0) = 0 (which is the same for both x=0x = 0 and x=0-x = 0).

    Since f(x)=f(x)f(-x) = f(x) for all values in the table, the function is even.

  2. Odd Function Test: A function is odd if f(x)=f(x)f(-x) = -f(x) for all values of xx. This does not hold true because f(2)=6f(-2) = 6 but f(2)=6-f(2) = -6, and similarly for other values, so the function is not odd.

Conclusion: The function f(x)=3xf(x) = 3|x| is even.

Would you like more details on how to determine whether a function is even or odd? Here are some related questions:

  1. What are the characteristics of even and odd functions in general?
  2. How does the absolute value function affect the evenness of a function?
  3. Can a function be neither even nor odd? If so, how can you tell?
  4. What are some examples of odd functions, and how do they differ from even functions?
  5. How would the graph of f(x)=3xf(x) = 3|x| look visually?

Tip: Even functions are symmetric about the y-axis, while odd functions are symmetric about the origin.

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Math Problem Analysis

Mathematical Concepts

Algebra
Absolute Value Functions
Even and Odd Functions

Formulas

f(x) = 3|x|
Even function test: f(-x) = f(x)
Odd function test: f(-x) = -f(x)

Theorems

Even Function Test
Odd Function Test

Suitable Grade Level

Grades 9-11