Model Systems of Linear Equations

Which system of equations represents the graph?

• y = -3/5x - 3
  y = 3x - 3

• y = - 5/3 x + 3
  x - 3y = 9

On a graph, the solution to a system of linear equations is given by _____

• The x-intercept of each line

• The y-intercept of each line

• All points on either line

• The point of intersection of the lines

Look at the graph to the left.

 

Which of the following ordered pairs represents the solution to the system?

• (1, 2)

• (2, 2)

• (2, 1)

• (0, 2)

Jack's work is shown on the left. What can be concluded about the solution to the system based on Jack's work?

• Jack made a mistake

• There is no solution to the system

• There are infinitely many solutions to the system

• There is one solution to the system

Michelle and Julie are 17-year old twins, who decided to save their earnings to buy a car.  One week Michelle worked 8 hours and Julie worked 14 hours, and they saved $128.  The next week Michelle worked 12 hours, Julie worked 16 hours, and they earned $162. Write a system of equations to model the situation. Solve the system to determine how much each girl earns per hour.

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Which is not a solution to the system shown in the graph?

• (-1, 1)

• (0, 1)

• (-1, -1)

• (1, -1)

Which is the solution region for the system of inequalities?

• Region A

• Region B

• Region C

• Region D

Look at the system of equations below: For the system to have no solution, what must be true of a and b?

• 
• 
• 
• 

Which of the following ordered pairs represents the solution to the system?

• (-1, 1)

• (1, -1)

• (2, -1)

• (1, 1)