A1 Unit 5 quiz review

^{What is the solution?} 

• 1
• -2
• (1, 2)
• (1, -1)

Solve the system of equations by graphing.

• (4, 7)

• (3, 5)

• (6, 7)

• (5, 3)

Buzz graphed two lines in order to find the solution to a given system of equations.
What is the solution?

• (-1, 4)
• (1, -4)
• (-4, 1)
• (4, -1)

Solve by substitution

6x + y = -1
y = -3x - 4

• (3, 1)
• (1, 7)
• (-3, 1)
• (1, -7)

Solve by elimination:
4x+9y=28
-4x-y=-28

• (-7,0)
• (6,0)
• (-6,0)
• (7,0)

Solve by elimination
4x-6y= -6
-2x-12y= -12

• (0,1) 
• (1,0)
• (1,1)
• (2,1)

The system shown is

• y = -2x + 1

  y = x - 1

• y = 2x + 1

  y = -x - 1

• y = 2x - 1

  y = -x + 1

• y = -2x - 1

  y = x + 1