Solving Systems by Graphing

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What is a system of equations?

Back

A set of two or more equations with the same variables.

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Front

What does it mean for a system of equations to have a unique solution?

Back

It means there is exactly one set of values for the variables that satisfies all equations in the system.

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CCSS.8.EE.C.8B

Front

What does it mean for a system of equations to have no solution?

Back

It means the equations represent parallel lines that never intersect.

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CCSS.8.EE.C.8A

Front

What does it mean for a system of equations to have infinite solutions?

Back

It means the equations represent the same line, so every point on the line is a solution.

Tags

CCSS.8.EE.C.8A

Front

How do you graph a linear equation?

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You can graph a linear equation by finding two or more points that satisfy the equation and connecting them with a straight line.

Front

What is the graphical representation of a system of equations with one solution?

Back

Two lines that intersect at a single point.

Tags

CCSS.8.EE.C.8A

Front

What is the graphical representation of a system of equations with no solution?

Back

Two parallel lines that never meet.

Tags

CCSS.8.EE.C.8A

Front

What is the graphical representation of a system of equations with infinite solutions?

Back

Two overlapping lines that are the same.

Tags

CCSS.8.EE.C.8A

Front

How can you determine the solution of a system of equations by graphing?

Back

By plotting the equations on the same graph and identifying the point(s) where they intersect.

Tags

CCSS.8.EE.C.8B

Front

What is the substitution method in solving systems of equations?

Back

A method where you solve one equation for one variable and substitute that expression into the other equation.

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6