Solving Systems of Equations by Graphing

The video tutorial covers lesson 5.1 on solving systems of equations by graphing. It begins with an introduction to systems of equations, defining them as two or more equations with the same variables. The tutorial explains graphical solutions, focusing on intersection points, and describes three possible outcomes: one solution, no solution, and infinite solutions. The lesson outlines steps to solve systems by graphing, including rewriting equations in slope-intercept form, graphing the lines, and identifying solutions. Several example problems are worked through to demonstrate these concepts.

What is a system of equations?

• A single equation with multiple variables

• Two or more equations with the same variables

• Two or more equations with different variables

• A single equation with one variable

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CCSS.HSA.REI.C.6

CCSS.8.EE.C.8B

What does it mean for two lines to intersect?

• They are parallel

• They overlap completely

• They meet at exactly one point

• They never meet

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CCSS.HSG.CO.A.1

Which of the following represents a system with no solution?

• Two intersecting lines

• A single line

• Two parallel lines

• Two overlapping lines

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CCSS.8.EE.C.8A

What is the first step in solving systems of equations by graphing?

• Graph the lines

• Check for parallel lines

• Rewrite in y = mx + b form

• Identify the solutions

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CCSS.8.EE.C.8B

In the equation y = mx + b, what does 'm' represent?

• The y-intercept

• The slope

• The x-intercept

• The solution

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CCSS.8.F.A.3

CCSS.8.EE.B.6

What is the solution to the system of equations y = x + 8 and y = 2x + 1?

• (2, 4)

• (3, 5)

• (1, 3)

• (3, -5)

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CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What is the y-intercept of the equation y = 3x + 8?

• 0

• 8

• 3

• 1

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CCSS.8.F.A.3

CCSS.8.EE.B.6

If two lines have the same slope but different y-intercepts, what is the solution to the system?

• Cannot be determined

• One solution

• No solution

• Infinite solutions

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CCSS.8.EE.C.8B

What does it mean if two lines overlap completely?

• Infinite solutions

• No solution

• One solution

• Cannot be determined

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CCSS.8.EE.C.8B

What is the slope of the equation y = -1/2x + 2?

• 1/2

• 2

• -2

• -1/2

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CCSS.8.EE.B.5