Math Problem Statement
I need help on this. I’ve looked everywhere but seemed that I can’t grasp this how to determine where to shade
Solution
It looks like you're working with inequalities, specifically , and you're asking about how to determine where to shade on a graph. Let me explain how to graph this inequality and where to shade.
Steps to Graph :
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Start with the equation of the boundary line:
- Treat the inequality as if it were an equation, . This is the boundary line. It has a slope of 4 and a y-intercept of -2.
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Plot the boundary line:
- The y-intercept is -2, so start by plotting the point on the graph.
- The slope is 4, which means for every 1 unit you move to the right, you move 4 units up. Plot another point using this slope, like .
- Now, draw the boundary line. Since the inequality is , use a dashed line because the points on the line are not included in the solution (the inequality is strict: "greater than," not "greater than or equal to").
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Determine where to shade:
- To figure out which side of the line to shade, choose a test point that is not on the boundary line. A good point to use is the origin, .
- Plug the test point into the inequality:
- This is a true statement, so the region that includes should be shaded.
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Shading:
- Since satisfies the inequality, shade above the boundary line, because the inequality is . If the inequality had been , you would shade below the line.
Would you like any further details on this? Here are some follow-up questions to help deepen your understanding:
- How do you plot points using the slope-intercept form of a line?
- What changes if the inequality were instead?
- How would you test if a point lies on the boundary line?
- What other test points can you use to verify the shading?
- How do you handle vertical or horizontal lines when graphing inequalities?
Tip: When working with inequalities, always remember that a dashed line represents a strict inequality ( or ), while a solid line represents inclusive inequalities ( or ).
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Math Problem Analysis
Mathematical Concepts
Algebra
Graphing Inequalities
Linear Equations
Formulas
Slope-intercept form: y = mx + b
Inequalities: y > 4x - 2
Theorems
Test Point Method for Inequalities
Slope-Intercept Theorem
Suitable Grade Level
Grades 7-9