Graphs of Equations in Two Variables

What is the equation of the line?

• y = 20x

• y = x + 20

• y = 2x

• y = x + 2

Write an equation for this relationship.

• y=18x

• y=18.50x

• y=22.50x

• y=22x

The graphs of the equations 2x+3y-2=0 and x-2y-8=0 are two lines which are_______

• Coincident

• Parallel

• Intersecting exactly at one point

• Perpendicular to each other

• Consistent : Unique solution
• Consistent: Many Solutions 
• Inconsistent: No solution 
• None of the above 

If a pair of linear equations is consistent then their graph lines will be_______

• Parallel

• Always coincident.

• Always intersecting.

• Intersecting or coincident.

If a system of equations has no solution, what does the graph look like?

• intersecting lines

• parallel lines

• Perpendicular lines

• coincident lines

The equation y = 3x + 5 has _____

• unique solution 

• Only two solutions

• Three solutions 

• Infinitely many solutions 

For what value of k, do the equations 3x – y + 8 = 0 and 6x – ky = –16 represent coincident lines?

• 1/2

• −1/2

• 2

• −2

If the lines given by 3x+2ky =2 and 2x+5y+1= 0 are parallel then the value of k is _______

• the independent variable is distance
• the independent variable is d=25 t
• the dependent variable is time
• the dependent variable is distance