Substitution

Is (2,3) a solution to y=2x+1

• yes, because 3=2(2)+1 is true

• yes, because 2=2(3)+1 is true

• no, because when the x=2 the y should be 5

• no, because when the x=2 the y should be 4

Find the solution to these systems

y=4x

y+5x=18

• (0,4)

• (0,18)

• (9,2)

• (2,8)

• (0,4)

• (22,4)

• (4,0)

• (-2,4)

When two lines NEVER cross that is called...

• One solution

• No Solutions

• Two solutions

• Infinite Solutions

Find the solution to these systems

y=4x+4

3x+y=25

• (2,12)

• (3,16)

• (0,25)

• (0,4)

Find the solution to these systems

y=1x-3

y=3x+25

• (14,25)

• (-14,17)

• (-17,2)

• (-14,-17)

Which graph represents a system of equations with infinite solutions?

• 
• 
• 

Solve the system of equations.

• (11, 21)

• (3, 11)

• (11, -67)

• No solution

• Infinite solutions

Which graph represents a system of equations with no solution?

• 
• 
• 
• None of the above