Math Problem Statement
Find the graph of the linear function y = x - 2.
Solution
The equation given is . This is in slope-intercept form, , where is the slope, and is the y-intercept.
Key Steps to Identify the Correct Graph:
-
Y-Intercept ():
- The y-intercept is . This means the graph crosses the y-axis at .
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Slope ():
- The slope is , which means the line rises 1 unit for every 1 unit it moves to the right.
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Choose the Correct Graph:
- Check which graph starts at and has a slope of . This means a diagonal line that goes upward to the right.
Based on the two options provided:
- The left graph shows a slope of 1 and intercepts the y-axis at . Therefore, the left graph is the correct representation of .
Would you like more details or have further questions about this? Here are some related questions:
- What is the general approach to identifying graphs of linear equations?
- How can the slope-intercept form help in sketching graphs manually?
- What are the common mistakes when interpreting the slope and y-intercept?
- How can we verify if a point lies on the line of a given equation?
- How would the graph change if the slope or intercept is modified?
Tip: Always check the y-intercept first and then verify the slope when matching graphs to equations.
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Math Problem Analysis
Mathematical Concepts
Algebra
Linear Equations
Graphing Linear Functions
Slope-Intercept Form
Formulas
Slope-Intercept Form: y = mx + b
Theorems
Slope-Intercept Theorem
Suitable Grade Level
Grades 6-8