Solving Systems of Linear Equations by Graphing

The video tutorial explains how to solve systems of equations by graphing. It covers the basic terminology and demonstrates how to graph lines using slope-intercept form. The tutorial discusses different outcomes when graphing systems: a single intersection point indicates one solution, parallel lines indicate no solution, and identical lines indicate infinitely many solutions. The video concludes with a summary of these concepts.

What represents the solution to a system of equations when graphed?

• The x-intercept of each line

• The y-intercept of each line

• The point where the lines intersect

• The slope of each line

Tags

CCSS.8.EE.C.8B

What does the point of intersection (-4, 1) signify in a system of equations?

• The unique solution to the system

• The x-intercept of one of the lines

• A parallel point

• The y-intercept of one of the lines

Tags

CCSS.8.EE.C.8A

What is the slope-intercept form of a line?

• x = my + b

• y = mx + b

• ax + by = c

• y = bx + m

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CCSS.8.EE.B.6

CCSS.8.F.A.3

How do you find the y-intercept of a line in slope-intercept form?

• By setting y to 0

• It's the 'b' in y = mx + b

• By setting x to 0

• By finding the slope

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CCSS.8.EE.B.6

CCSS.8.F.A.3

What is the slope of a line that goes down two and to the right three?

• 3/2

• -3/2

• -2/3

• 2/3

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CCSS.8.EE.B.5

In a system of equations, if one line has a slope of 1/2 and another has a slope of -1, what can be inferred?

• The lines will intersect at a single point

• The lines are parallel

• The lines will not intersect

• The lines are the same

Tags

CCSS.8.EE.C.8B

If two lines intersect at (4, 0), what does this point represent?

• The solution to the system of equations

• The y-intercept of both lines

• A point of parallel lines

• The slope of both lines

Tags

CCSS.8.EE.C.8B

How can you tell graphically if a system of equations has no solution?

• The lines are parallel

• The lines intersect at the origin

• The lines have the same y-intercept

• The lines are perpendicular

Tags

CCSS.8.EE.C.8A

What indicates a system of equations has infinitely many solutions?

• The lines have different slopes

• The lines do not intersect

• Each line has a unique y-intercept

• The equations are equivalent

Tags

CCSS.8.EE.C.8B

What does it mean if two lines on a graph are identical?

• The lines are perpendicular

• The system has a unique solution

• The system has no solution

• The system has infinitely many solutions

Tags

CCSS.8.EE.C.8A