Review Unit 4-1 and 4-2

• (2, -2)
• (2, 2)
• (-2, 2)
• (-2, -2)

• Infinitely Many Solutions
• No Solution

The solution (x, y) to a system of equations is the point where they...? 

• Run off the graph
• Don't touch
• Intersect
• Exist

What is the solution to the following system of equations?

• ( 3 , -1 )
• ( 7 , 7 )
• ( -1 , 3 )
• ( 1 , 1 )

What is the solution to this system of equations? Solve by substitution or graphing.

• (7, -8)

• (-7, 8)

• (-7, -8)

• (7, 8)

-4x-2y=-12
4x+8y=-24

• (5,6)
• (6,-6)
• (6,-2)
• (4,-3)

When does a system of equations have no solutions?

• When the lines cross

• When slopes of the lines are different

• When the slopes are the same

• There is ALWAYS a solution!

Parallel lines have ____ solution(s).

• No
• One
• Many

Intersecting lines have _____ solution(s).

• No
• One
• many

Two equations that produce the same line have _____ solution(s).

• no
• one
• infinitely many