Math Problem Statement

Select the correct graph for the function f(x) = -x - 2.

Solution

To determine the correct graph for the function f(x)=x2f(x) = -x - 2, let’s analyze its key properties:

  1. Slope: The function has a slope of -1, indicating a downward slant from left to right.
  2. Y-intercept: The y-intercept is -2, which means the graph crosses the y-axis at the point (0, -2).

With these two characteristics, we should look for a graph where:

  • The line crosses the y-axis at -2.
  • The line slopes downward with a slope of -1, meaning for each step right (1 unit increase in xx), the yy value decreases by 1.

After examining each graph:

  • Graph B shows a line that crosses the y-axis at -2 and has a downward slope with a slope of -1.

Answer: The correct choice is B.

Would you like more details or have any questions about this solution?


Here are 5 related questions that expand on this concept:

  1. How do you determine the slope of a line from its equation?
  2. What does the y-intercept represent in a linear equation?
  3. How would the graph change if the function was f(x)=x2f(x) = x - 2?
  4. How does changing the slope affect the steepness of the line?
  5. What would the graph look like for f(x)=x+2f(x) = -x + 2?

Tip: For linear functions in the form f(x)=mx+bf(x) = mx + b, mm represents the slope, and bb represents the y-intercept.

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Math Problem Analysis

Mathematical Concepts

Linear Functions
Graphing
Slope and Intercept

Formulas

Slope-intercept form: y = mx + b

Theorems

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Suitable Grade Level

Grades 8-10