Exploring Systems of Linear Inequalities

This video tutorial introduces Unit 3, focusing on solving systems of equations and inequalities. It explains how to graph linear inequalities on a coordinate plane, emphasizing the importance of shading and identifying overlapping regions as solutions. The tutorial provides examples to illustrate the process of determining whether specific points are solutions to the system. It concludes with a review of key concepts and additional examples to reinforce learning.

What is the main focus of Unit 3?

• Understanding polynomial functions

• Solving systems of equations or inequalities

• Graphing linear functions

• Solving quadratic equations

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When graphing linear inequalities, what is the first step?

• Find the x-intercept

• Identify the y-intercept

• Shade the region above the line

• Draw a solid line

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CCSS.HSA.REI.D.12

What should you do after graphing the first inequality?

• Draw a vertical line

• Shade the entire coordinate plane

• Graph the second inequality

• Erase the first graph

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CCSS.HSA.REI.D.12

In the example where y is greater than or equal to 2x - 3, where should you shade?

• Above the line

• To the left of the line

• Below the line

• On the line

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CCSS.HSA.REI.D.12

Which of the following points is a solution if it lies in the shaded overlap region?

• In the shaded overlap

• Outside the shaded region

• On the dotted line

• On the x-axis

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If a point lies on a solid line within the shaded region, is it a solution?

• Yes

• No

• Only if it is on the x-axis

• Only if it is on the y-axis

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CCSS.HSA.REI.D.12

What is the significance of a dotted line in graphing inequalities?

• It indicates a less than or equal to inequality

• It indicates a greater than or equal to inequality

• It indicates a strict inequality (greater than or less than)

• It indicates no solution

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CCSS.HSA.REI.D.12

Which point is a solution if it lies on a solid line and within the shaded region?

• 4, 5

• 2, 3

• 3, 3

• Negative 10, 0

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What does it mean if there is no overlap in the shaded regions of two inequalities?

• The solution is on the x-axis

• The solution is on the y-axis

• There is no solution

• There are infinite solutions

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CCSS.HSA.REI.D.12

What is the most important thing to remember when determining the solution to a system of linear inequalities?

• The x-intercept

• Where the shadings overlap

• The slope

• The y-intercept

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CCSS.HSA.REI.D.12