Math Problem Statement

Two students represent the same linear function, f(x). Student 1 correctly writes f(x) as an equation, while Student 2 correctly creates a table for f(x). Which statement is true?

Solution

Let's analyze the given problem carefully.

Given Information:

  • Student 1: Represents the linear function as an equation: f(x)=3x6f(x) = 3x - 6

  • Student 2: Represents the function in a table with values:

    \hline x & f(x) \\ \hline -2 & -12 \\ -1 & -9 \\ 0 & -6 \\ 1 & -3 \\ 2 & 0 \\ \hline \end{array}$$

Solution Analysis:

  1. Finding the Intercepts:

    • Equation from Student 1 (f(x)=3x6f(x) = 3x - 6):

      • Y-intercept:
        The y-intercept occurs when x=0x = 0: f(0)=3(0)6=6f(0) = 3(0) - 6 = -6 So, the y-intercept is at (0,6)(0, -6).

      • X-intercept:
        The x-intercept occurs when f(x)=0f(x) = 0: 3x6=03x - 6 = 0 3x=63x = 6 x=2x = 2 So, the x-intercept is at (2,0)(2, 0).

    • Table from Student 2:

      • From the table, when x=2x = 2, f(x)=0f(x) = 0. This confirms that the x-intercept is at (2,0)(2, 0).
      • When x=0x = 0, f(x)=6f(x) = -6. This confirms that the y-intercept is at (0,6)(0, -6).
  2. Evaluating the Statements:

    • Option A:
      "The equation of f(x)f(x) reveals an xx-intercept at (2,0)(2, 0), while the table for f(x)f(x) reveals a yy-intercept at (0,6)(0, -6)."

      This statement is true based on the calculations and values presented above.

    • Option B, C, and D:
      All these options are false because they either mix up the intercepts or give incorrect points for the intercepts.

Conclusion:

The correct answer is:

  • Option A: The equation of f(x)f(x) reveals an xx-intercept at (2,0)(2, 0), while the table for f(x)f(x) reveals a yy-intercept at (0,6)(0, -6).

Would you like me to explain anything in more detail, or do you have any questions?

Here are 5 related questions to expand your understanding:

  1. How do you determine the x-intercept of a linear equation given in standard form?
  2. What is the slope of the function f(x)=3x6f(x) = 3x - 6, and how can it be interpreted?
  3. How would the graph of f(x)=3x6f(x) = 3x - 6 look, and where would the intercepts be plotted?
  4. What is the difference between x-intercepts and y-intercepts in any function?
  5. How can you verify the intercepts of a function if only given its table of values?

Tip: To determine intercepts, set one variable to zero and solve for the other—this method works for both linear and non-linear functions.

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Math Problem Analysis

Mathematical Concepts

Linear Functions
Intercepts
Algebra

Formulas

Slope-intercept form: f(x) = mx + b

Theorems

The x-intercept is found by setting f(x) = 0
The y-intercept is found by setting x = 0

Suitable Grade Level

Grades 7-9