Math Problem Statement
Select the correct graph for the function f(x) = -x - 2.
Solution
To determine the correct graph for the function , let’s analyze its key properties:
- Slope: The function has a slope of -1, indicating a downward slant from left to right.
- 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 ), the 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:
- How do you determine the slope of a line from its equation?
- What does the y-intercept represent in a linear equation?
- How would the graph change if the function was ?
- How does changing the slope affect the steepness of the line?
- What would the graph look like for ?
Tip: For linear functions in the form , represents the slope, and 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
-
Suitable Grade Level
Grades 8-10