Math Problem Statement
Solution
To determine which equation matches the given graph, let's analyze the line visually.
Step 1: Analyze the slope
The line in the image has a negative slope, as it is slanting downward from left to right. This tells us that the equation of the line must have a negative coefficient for if written in the form .
Step 2: Analyze the y-intercept
The line crosses the y-axis at a positive point, indicating that the y-intercept in the equation is positive.
Step 3: Check the options
Let's check the given equations and identify which could represent this line:
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A. : This equation has a negative slope (-4) and a positive y-intercept (2), which matches our analysis. So, Option A could be correct.
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B. : Rewriting this equation in slope-intercept form , we solve for : The slope is negative , and the y-intercept is 3, so this could also match the graph. Option B could be correct.
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C. : This represents a horizontal line with slope 0, which does not match the graph. Option C is not correct.
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D. : Rewriting this in slope-intercept form: This equation has a positive slope, so it does not match the graph. Option D is not correct.
Conclusion:
The equations that match the graph are A and B.
Would you like further details or explanations? Here are 5 follow-up questions:
- How do we determine the slope from a graph?
- Why does a negative slope indicate a line slanting downward?
- What are the general forms of linear equations, and how can we convert between them?
- How do y-intercepts help in identifying equations?
- Can you explain how to solve for from a standard-form linear equation?
Tip: Always check both the slope and y-intercept when matching an equation to a graph.
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Math Problem Analysis
Mathematical Concepts
Linear Equations
Graph Analysis
Slope-Intercept Form
Formulas
Slope-Intercept Form: y = mx + b
Standard Form to Slope-Intercept Form Conversion
Theorems
Equation of a Line
Suitable Grade Level
Grades 9-12